Photoshop is simply reporting a different resolution. The resolution setting has no impact on the quality or size of the image. The image is so many pixels in each direction. For instance, my camera produces images that are 6000 x 4000 pixels, and they are that many pixels regardless of whether the PPI is set to 72 PPI or 300 PPI or what ever. The PPI setting will not actually change the physical size of the image. It basically is a setting to be used to specify the intent of the image file.
Go to Preferences >> External editing (Tab)
You may have resolution set to 300
That determines what is sent into Photoshop.
You can change it to 72 if preferred if the final output is to be for screen or web usage. For printing I would use 240 to 300.
Windows - Edit >> Preferences >> External editing (Tab)
Mac - Lightroom >> Preferences >> External editing (Tab)
Thanks, JimHess. I pretty much understand that ~ I am mainly wondering when/how the numbers are changed. Maybe it doesn't matter and I'm making it a bigger deal than I need to; I'm one of those who needs to understand what's going on in the background, I guess!
Thanks to everyone else who chimed in while I was replying to JimHess ~ I love that I can get such excellent help here!