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Finding the Fourth Proportional to 91,411.52, 137,169.68 and 49,291.43

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Solution

The fourth proportional to 91,411.52, 137,169.68 and 49,291.43 is: 73,965.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,411.52 : 137,169.68 = 49,291.43 : x
  2. Step 2: Convert to fraction form
    91,411.52/137,169.68 = 49,291.43/x
  3. Step 3: Cross multiply
    91,411.52x = 137,169.68 × 49,291.43
  4. Step 4: Simplify right side
    91,411.52x = 6,761,288,747.54
  5. Step 5: Solve for x
    x = 6,761,288,747.54/91,411.52
  6. Step 6: Final answer
    x = 73,965.39

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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.