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Finding the Fourth Proportional to 67,912.59, 101,874.51 and 21,165.47

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Solution

The fourth proportional to 67,912.59, 101,874.51 and 21,165.47 is: 31,749.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,912.59 : 101,874.51 = 21,165.47 : x
  2. Step 2: Convert to fraction form
    67,912.59/101,874.51 = 21,165.47/x
  3. Step 3: Cross multiply
    67,912.59x = 101,874.51 × 21,165.47
  4. Step 4: Simplify right side
    67,912.59x = 2,156,221,757.83
  5. Step 5: Solve for x
    x = 2,156,221,757.83/67,912.59
  6. Step 6: Final answer
    x = 31,749.95

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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.