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Finding the Fourth Proportional to 71,242.53, 106,885.19 and 21,324.25

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Solution

The fourth proportional to 71,242.53, 106,885.19 and 21,324.25 is: 31,992.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,242.53 : 106,885.19 = 21,324.25 : x
  2. Step 2: Convert to fraction form
    71,242.53/106,885.19 = 21,324.25/x
  3. Step 3: Cross multiply
    71,242.53x = 106,885.19 × 21,324.25
  4. Step 4: Simplify right side
    71,242.53x = 2,279,246,512.86
  5. Step 5: Solve for x
    x = 2,279,246,512.86/71,242.53
  6. Step 6: Final answer
    x = 31,992.78

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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.