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Finding the Fourth Proportional to 71,706.52, 107,545.15 and 68,149.90

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Solution

The fourth proportional to 71,706.52, 107,545.15 and 68,149.90 is: 102,210.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,706.52 : 107,545.15 = 68,149.90 : x
  2. Step 2: Convert to fraction form
    71,706.52/107,545.15 = 68,149.90/x
  3. Step 3: Cross multiply
    71,706.52x = 107,545.15 × 68,149.90
  4. Step 4: Simplify right side
    71,706.52x = 7,329,191,217.99
  5. Step 5: Solve for x
    x = 7,329,191,217.99/71,706.52
  6. Step 6: Final answer
    x = 102,210.95

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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.