Question

143 : 120 : : 221 : ?​

Answer 1

Answer:

197

Step-by-step explanation:

143-120=23

221-23=197

Answer 2

(?) is 185.45

GIVEN:- 143: 120:: 221:?

TO FIND:- (?)

SOLUTION:-

• We can define a ratio of two quantities a and b of the same kind in the same units as a fraction a/b
• A proportion is an equation that states that two ratios are equal. Four numbers are said to be in proportion if the ratio of the first two is equal to the ratio of the last two i.e., a, b, c and d are said to be in proportion, if a: b = c / d This is expressed as a: b::c: d. It is read as "a is to b as c is to d.
• A proportion can be expressed in fractions as a/b = c/d

According to the question,

Let (?) be x

143: 120:: 221: x

$\frac{143}{120} = \frac{221}{x}$

By cross multiplying

$143 \times x = 221 \times 120 \\ 143x = 26520$

Dividing both sides by 143

$\frac{143x}{143} = \frac{26520}{143} \\ x = 185.45$

Hence, (?) is 185.45

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