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Finding the Fourth Proportional to 71,909.53, 107,912.90 and 25,162.81

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Solution

The fourth proportional to 71,909.53, 107,912.90 and 25,162.81 is: 37,761.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,909.53 : 107,912.90 = 25,162.81 : x
  2. Step 2: Convert to fraction form
    71,909.53/107,912.90 = 25,162.81/x
  3. Step 3: Cross multiply
    71,909.53x = 107,912.90 × 25,162.81
  4. Step 4: Simplify right side
    71,909.53x = 2,715,391,673.43
  5. Step 5: Solve for x
    x = 2,715,391,673.43/71,909.53
  6. Step 6: Final answer
    x = 37,761.22

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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.