Math box puzzle

[Radio]

Totally stumped me, but Sweet Wife figured it out in under a minute.

:24:

Give it a shot.

[NN5I]

Totally stumps me, too.

[Radio]

The clue I will give you is "ratio" of the outer numbers to the inner numbers.

In each of the 4 boxes the ratio is the same.

Sweet Wife figured it out in about a minute. Give it some thought and I'll tell you the answer in 24 hours. (9 pm Sunday)