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Finding the Fourth Proportional to 62,474.20, 93,711.30 and 20,921.20

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Solution

The fourth proportional to 62,474.20, 93,711.30 and 20,921.20 is: 31,381.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,474.20 : 93,711.30 = 20,921.20 : x
  2. Step 2: Convert to fraction form
    62,474.20/93,711.30 = 20,921.20/x
  3. Step 3: Cross multiply
    62,474.20x = 93,711.30 × 20,921.20
  4. Step 4: Simplify right side
    62,474.20x = 1,960,552,849.56
  5. Step 5: Solve for x
    x = 1,960,552,849.56/62,474.20
  6. Step 6: Final answer
    x = 31,381.80

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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.