Determine if the following ratios form a proportion. Also, write the middle terms and extreme terms where the ratios form a proportion.
(a) 25 cm : 1 m and Rs 40 : Rs 160
(b) 39 litres : 65 litres and 6 bottles : 10 bottles
(c) 2 kg : 80 kg and 25 g : 625 g   
(d) 200 ml : 2.5 litre and Rs 4 : Rs 50

Explanation

a) 25cm/1m=25cm/100cm=1/4

`40Rs/160 Rs=1/4

They are proportionate

middle terms are 25 cm and 40 Rs

Extreme terms are 1 m and 160 Rs

b)39l/65l 39/65

6/10 bottles=3/5

They are not Proportionate.

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