Just place the image.
Selecting the image and choosing Window>Info you will see two things, effective and actual.
Actual is what the image is - and effective is what the ppi is after scaling.
It's the effective you need to look for that it's above 72 ppi (don't mind if it's 105 or 193.392392 or 300 or 19990000 ppi) as long as it's above it.
File>Export and choose PDF
Open said PDF in photoshop (one of the few times this is a legit thing to do)
Then use File>Save for Web and choose PNG 24 (or JPEG but PNG gives better quality)
Also make sure your dimensions are correct in the Save for Web dialog box.
If you want to maintain the pixel dimension of your InDesign page export as 72ppi and as Eugene points out images will be sampled down or up to 72ppi on the export. The downsampling of oversized images could cause some softening, so if you want to be fussy getting the images to 72ppi in Photoshop followed by the desired sharpening before placing could be marginally better.
If you export to PDF rather than export to JPEG, you have to open the PDF at 72ppi to maintain the page pixel dimensions.
See these threads on JPEG quality:
Thank you very much Eugene, that makes sense
I appreciate your time and expertise!