Are you looking for big returns for your investment portfolio? If you are, it could pay to look at the three ASX 200 shares named below.

Here's what sort of returns could be on offer with these shares according to analysts:

IDP Education Ltd (ASX: IEL)

A recent note out of Goldman Sachs reveals that its analysts think this language testing and student placement company's shares are very cheap.

While the broker acknowledges that times have been hard for IDP Education recently, it feels that a change is coming and it deserves a premium valuation. It said:

We believe IEL's premium valuation is justified given the medium-term earnings potential driven by: (1) Structural growth in multi-destination placements, supplemented by an ongoing Australian recovery; (2) Ability to grow market share in the highly fragmented Canadian and UK SP markets; (3) Reinvestment in digital capabilities to increase competitive moat and generate new earnings streams.

Goldman has a buy rating and $19.85 price target on its shares. This implies potential upside of 44% for investors over the next 12 months.

Johns Lyng Group Ltd (ASX: JLG)

Morgans believes that Johns Lyng could be an ASX 200 share to buy. It is an insurance building and restoration services company.

The broker responded very positively to the recent announcement of a new acquisition. It said:

We see Keystone as highly complementary to JLG's existing IB&RS business, which provides further scale to the group's domestic operations (particularly within QLD) as well as increased exposure to commercial and large loss claims work. Incorporating Keystone into our forecasts see our EBITDA upgraded by ~7% in FY25-27F, while increased level of debt to fund Keystone (and SSKB & Chill-rite), sees our EPS forecasts increase ~4%.

Morgans has an add rating and $5.10 price target on the ASX share. This suggests that its shares could rise 30% from current levels.

Megaport Ltd (ASX: MP1)

Finally, Goldman Sachs thinks that Megaport could be an ASX 200 share with major upside potential.

It is network as a service provider that the broker believes is well-positioned for growth due to structural tailwinds and the cloud computing boom. Goldman commented:

We believe MP1 will benefit from strong structural tailwinds from the adoption of public cloud including multi-cloud usage and the transition towards NaaS technologies.

Goldman Sachs has a buy rating and $12.00 price target on the company's shares. This implies potential upside of 65% for investors over the next 12 months.