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Finding the Fourth Proportional to 68,289.27, 102,433.95 and 21,545.79

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Solution

The fourth proportional to 68,289.27, 102,433.95 and 21,545.79 is: 32,318.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,289.27 : 102,433.95 = 21,545.79 : x
  2. Step 2: Convert to fraction form
    68,289.27/102,433.95 = 21,545.79/x
  3. Step 3: Cross multiply
    68,289.27x = 102,433.95 × 21,545.79
  4. Step 4: Simplify right side
    68,289.27x = 2,207,020,375.57
  5. Step 5: Solve for x
    x = 2,207,020,375.57/68,289.27
  6. Step 6: Final answer
    x = 32,318.70

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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.