Finding the Fourth Proportional to 71,720,356.68, 98,966,460.99 and 40,357,859.12
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Solution
The fourth proportional to 71,720,356.68, 98,966,460.99 and 40,357,859.12 is: 55,689,551.41
Step by Step Solution
- Step 1: Write the proportion equation
71,720,356.68 : 98,966,460.99 = 40,357,859.12 : x - Step 2: Convert to fraction form
71,720,356.68/98,966,460.99 = 40,357,859.12/x - Step 3: Cross multiply
71,720,356.68x = 98,966,460.99 × 40,357,859.12 - Step 4: Simplify right side
71,720,356.68x = 3,994,074,490,568,372 - Step 5: Solve for x
x = 3,994,074,490,568,372/71,720,356.68 - Step 6: Final answer
x = 55,689,551.41
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.