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Finding the Fourth Proportional to 72,306.62, 99,732 and 62,217.70

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Solution

The fourth proportional to 72,306.62, 99,732 and 62,217.70 is: 85,816.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,306.62 : 99,732 = 62,217.70 : x
  2. Step 2: Convert to fraction form
    72,306.62/99,732 = 62,217.70/x
  3. Step 3: Cross multiply
    72,306.62x = 99,732 × 62,217.70
  4. Step 4: Simplify right side
    72,306.62x = 6,205,095,656.40
  5. Step 5: Solve for x
    x = 6,205,095,656.40/72,306.62
  6. Step 6: Final answer
    x = 85,816.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.