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Finding the Fourth Proportional to 66,391,372.80, 99,587,059.20 and 55,053,964.80

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Solution

The fourth proportional to 66,391,372.80, 99,587,059.20 and 55,053,964.80 is: 82,580,947.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,391,372.80 : 99,587,059.20 = 55,053,964.80 : x
  2. Step 2: Convert to fraction form
    66,391,372.80/99,587,059.20 = 55,053,964.80/x
  3. Step 3: Cross multiply
    66,391,372.80x = 99,587,059.20 × 55,053,964.80
  4. Step 4: Simplify right side
    66,391,372.80x = 5,482,662,451,732,316
  5. Step 5: Solve for x
    x = 5,482,662,451,732,316/66,391,372.80
  6. Step 6: Final answer
    x = 82,580,947.20

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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.