Home / 81,049.18-121,490.61-31,115.83

Finding the Fourth Proportional to 81,049.18, 121,490.61 and 31,115.83

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Solution

The fourth proportional to 81,049.18, 121,490.61 and 31,115.83 is: 46,641.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,049.18 : 121,490.61 = 31,115.83 : x
  2. Step 2: Convert to fraction form
    81,049.18/121,490.61 = 31,115.83/x
  3. Step 3: Cross multiply
    81,049.18x = 121,490.61 × 31,115.83
  4. Step 4: Simplify right side
    81,049.18x = 3,780,281,167.36
  5. Step 5: Solve for x
    x = 3,780,281,167.36/81,049.18
  6. Step 6: Final answer
    x = 46,641.82

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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.