Question

in a proportion the second third and fourth term are 96, 105 and 120 respectively. Find the first term.​

Answer 1

Answer:

$Let \: the \: first \: term \: be \: x. \\ </p><p>So \: that \: x, 96, \: 105, \: 120 \: are \: in \: proportions. \\ </p><p>So \: using \: law \: of \: proportion \\ </p><p>x : 96 :: 105 : 120 \\ \frac{x}{96} = \frac{105}{120} \\ x = \frac{105}{120} \times 96 \\ x = 84$

Answer 2

→

x:96::105:120

x/96 = 105/120

x = 105×96/120

x = 84