Question

Determine if the following is in proportion.

$34,48,70,120$

Answer 1

If $a,b,c,d$are in proportion then,

$a\times d=b\times c$

So, here we have $34,48,70,120$

in which

$a=34,b=48,c=70,d=120$

now, $34\times 120=4080$

and, $48\times 70=3360$

Hence $a\times d\ne b\times c$

So, $34,48,70,120$ are not in proportion.