Question

please answer me fast

Answer 1

let the 3rd term be x

thus, 51:68:x:108

we know,

product of extremes=product of means

51×108=68×x

5508=68x

x=5508/68

x=81

2nd ans will be

12:x:8:14

thus,

12×x=8×14

12x=112

x=112/12

x=32/3

x=10.6

Answer 2

let
the first term be = 12
the third term be = 8
the fourth term be = 14
$so \\ the \: second \: term \: = let \: be \: x$
12: x::8:14
$\frac{12}{x } = \frac{8}{14}$
$x = \frac{12 \times 14}{8} = 21$
So, the second term = 21