Question

if A is proportional to B and A is proportional to C then why is proportional to BC​

Answer 1

a∝b⇒a=k

1

b;k

1

is a constant

b∝

c

1

⇒b=

c

k

2

;k

2

is a constant

⇒a=

c

k

1

k

2

=

c

k

3

;k

3

=k

1

k

2

is another constant

⇒a∝

c

1