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Finding the Fourth Proportional to 67,687, 101,540.20 and 20,943.52

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Solution

The fourth proportional to 67,687, 101,540.20 and 20,943.52 is: 31,418.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,687 : 101,540.20 = 20,943.52 : x
  2. Step 2: Convert to fraction form
    67,687/101,540.20 = 20,943.52/x
  3. Step 3: Cross multiply
    67,687x = 101,540.20 × 20,943.52
  4. Step 4: Simplify right side
    67,687x = 2,126,609,209.50
  5. Step 5: Solve for x
    x = 2,126,609,209.50/67,687
  6. Step 6: Final answer
    x = 31,418.28

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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.