BASH: If Statement With 2 Arrays To Perfrom Relative Converging Task

ok the data is fictional to keep it simple..

Here's the problem

UnixCommand followed by some piping & filtering

outputs: 2 arrays like this

10 0-9{3}
4  0-9{3}
7  0-9{3}

noteworthy thing is first column items are random, and may repeat with no particular pattern.

Intended Solution:

Run a loop with nested if statement, that'll check if left column item{(10) , (4) , (7)} -ge 50 then perform some action on right column item{0-9}

I understand I can get both columns in 2 arrays and work on them, but how to accomplish that 0 item in first array runs side by side to the 0 item in array2? Or is there any other easier way to accomplish it?