Question

25persons:130 person=15kg:78kg say true or false

Answer 1

(a) False, Because
12 2 12:18 2:3
18 3
= ==
and
28 1 28:56 1:2
56 2 = ==
These are not equal..

Answer 2

$\sf{Step-by-step \: explanation}$

Let the 4th ratio be x

25 : 130 : : 15 : x

Product of means = Product of extremes

25x= 130×15

x= $\dfrac{130 × 15}{25}$

After cancellation...

x= 78

Hence, proved that the proportion is true

$\boxed{True}$
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$\small\sf\blue{Thanks!!}$

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