The presented problem involves proportional reasoning. It requires determining the cost of a larger quantity of items given the price of a smaller quantity. For example, knowing the price of 50 apples allows for the calculation of the price for 75 apples by establishing a per-apple cost and then multiplying by the desired quantity.
This type of calculation is fundamental in everyday commerce and financial planning. Its application extends beyond simple transactions, aiding in inventory management, budgeting, and comparative shopping. Historically, such proportional calculations were essential for trade and resource allocation, pre-dating modern computational tools.