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Finding the Fourth Proportional to 40,491.88, 60,737.82 and 20,757.85

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Solution

The fourth proportional to 40,491.88, 60,737.82 and 20,757.85 is: 31,136.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,491.88 : 60,737.82 = 20,757.85 : x
  2. Step 2: Convert to fraction form
    40,491.88/60,737.82 = 20,757.85/x
  3. Step 3: Cross multiply
    40,491.88x = 60,737.82 × 20,757.85
  4. Step 4: Simplify right side
    40,491.88x = 1,260,786,556.89
  5. Step 5: Solve for x
    x = 1,260,786,556.89/40,491.88
  6. Step 6: Final answer
    x = 31,136.78

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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.