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Finding the Fourth Proportional to 71,909.96, 99,234.44 and 39,204.68

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Solution

The fourth proportional to 71,909.96, 99,234.44 and 39,204.68 is: 54,101.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,909.96 : 99,234.44 = 39,204.68 : x
  2. Step 2: Convert to fraction form
    71,909.96/99,234.44 = 39,204.68/x
  3. Step 3: Cross multiply
    71,909.96x = 99,234.44 × 39,204.68
  4. Step 4: Simplify right side
    71,909.96x = 3,890,454,465.18
  5. Step 5: Solve for x
    x = 3,890,454,465.18/71,909.96
  6. Step 6: Final answer
    x = 54,101.75

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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.