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Finding the Fourth Proportional to 66,327,547.80, 99,491,321.70 and 40,782,950.40

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Solution

The fourth proportional to 66,327,547.80, 99,491,321.70 and 40,782,950.40 is: 61,174,425.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,327,547.80 : 99,491,321.70 = 40,782,950.40 : x
  2. Step 2: Convert to fraction form
    66,327,547.80/99,491,321.70 = 40,782,950.40/x
  3. Step 3: Cross multiply
    66,327,547.80x = 99,491,321.70 × 40,782,950.40
  4. Step 4: Simplify right side
    66,327,547.80x = 4,057,549,638,121,543.50
  5. Step 5: Solve for x
    x = 4,057,549,638,121,543.50/66,327,547.80
  6. Step 6: Final answer
    x = 61,174,425.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.