Home / 100,691.12-138,957.24-55,370.96

Finding the Fourth Proportional to 100,691.12, 138,957.24 and 55,370.96

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Solution

The fourth proportional to 100,691.12, 138,957.24 and 55,370.96 is: 76,413.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,691.12 : 138,957.24 = 55,370.96 : x
  2. Step 2: Convert to fraction form
    100,691.12/138,957.24 = 55,370.96/x
  3. Step 3: Cross multiply
    100,691.12x = 138,957.24 × 55,370.96
  4. Step 4: Simplify right side
    100,691.12x = 7,694,195,777.75
  5. Step 5: Solve for x
    x = 7,694,195,777.75/100,691.12
  6. Step 6: Final answer
    x = 76,413.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.