# In which of the f

Numbers a, b, c, d are said to be in proportion if

(1) Here,

a = 28, b = 16, c = 21, d = 12

On dividing numerator and denominator by 4 gives,

Now,

On dividing numerator and denominator by 3 gives,

From (i) and (ii)

28, 16, 21, 12 are in proportion

2) Here,

a = 12, b = 32, c = 15, d = 35

On dividing numerator and denominator by 4 gives,

Now,

On dividing numerator and denominator by 5 gives,

From (i) and (ii)

12, 32, 15, 35 are not in proportion

(3) Here,

a = 39, b = 26, c = 57, d = 38

On dividing numerator and denominator by 13 gives,

Now,

On dividing numerator and denominator by 19 gives,

From (i) and (ii)

39, 26, 57, 38 are in proportion

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