How did rising population the industrial revolution?

The rising population, especially in the cities, did two things to further the Industrial Revolution. The first was that it created a larger and growing pool of labour. More people were willing and able to fill the expanding job market. The second most important thing is that a growing population caused a greater demand for products that were being produced. People of the cities needed more food, more housing, more consumer products. The Industrial Revolution is the real beginning of a consumption based society. More people meant more demand witch in turn fueled increased production to fill the need . . . and the people in that growing working class were both the producers and the consumers of the products.

To prevent the population from overgrowing

Absolute !