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Finding the Fourth Proportional to 67,726.31, 101,745.18 and 47,781.68

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Solution

The fourth proportional to 67,726.31, 101,745.18 and 47,781.68 is: 71,782.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,726.31 : 101,745.18 = 47,781.68 : x
  2. Step 2: Convert to fraction form
    67,726.31/101,745.18 = 47,781.68/x
  3. Step 3: Cross multiply
    67,726.31x = 101,745.18 × 47,781.68
  4. Step 4: Simplify right side
    67,726.31x = 4,861,555,123.58
  5. Step 5: Solve for x
    x = 4,861,555,123.58/67,726.31
  6. Step 6: Final answer
    x = 71,782.38

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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.