Hello everyone,
Not sure if anyone still has these issues but thought I'd post how I managed to get out of this and resume installation of pending apps...
After 2 days of being stuck on "installing app 114 of 170".... I got it to resume installing by doing this :
Go to Google play
To to installed apps
You'll see what's pending, etc, and here, find the one app that says "installing"
Tap to open it
Once open (in Google play, showing app details, etc), click the properties button (to right corner, the three dots button), then I check auto-update.
Tap the back button to go back to the list of apps...
The app will now actually install and the prices will resume without problems. Afterwards, you can go back and re-enable autoupdate for the app on question.
I was on a oneplus phone but I'm sure this is not specifically related to phone model.
Hope this helps!
Good luck!