Home / 81,761.16-122,675.76-42,327.12

Finding the Fourth Proportional to 81,761.16, 122,675.76 and 42,327.12

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Solution

The fourth proportional to 81,761.16, 122,675.76 and 42,327.12 is: 63,508.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,761.16 : 122,675.76 = 42,327.12 : x
  2. Step 2: Convert to fraction form
    81,761.16/122,675.76 = 42,327.12/x
  3. Step 3: Cross multiply
    81,761.16x = 122,675.76 × 42,327.12
  4. Step 4: Simplify right side
    81,761.16x = 5,192,511,614.61
  5. Step 5: Solve for x
    x = 5,192,511,614.61/81,761.16
  6. Step 6: Final answer
    x = 63,508.29

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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.