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Finding the Fourth Proportional to 424,078.38, 636,115.95 and 108,534.78

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Solution

The fourth proportional to 424,078.38, 636,115.95 and 108,534.78 is: 162,801.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,078.38 : 636,115.95 = 108,534.78 : x
  2. Step 2: Convert to fraction form
    424,078.38/636,115.95 = 108,534.78/x
  3. Step 3: Cross multiply
    424,078.38x = 636,115.95 × 108,534.78
  4. Step 4: Simplify right side
    424,078.38x = 69,040,704,687.74
  5. Step 5: Solve for x
    x = 69,040,704,687.74/424,078.38
  6. Step 6: Final answer
    x = 162,801.76

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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.