Home / 81,001.76-121,505.70-31,086.90

Finding the Fourth Proportional to 81,001.76, 121,505.70 and 31,086.90

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Solution

The fourth proportional to 81,001.76, 121,505.70 and 31,086.90 is: 46,631.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,001.76 : 121,505.70 = 31,086.90 : x
  2. Step 2: Convert to fraction form
    81,001.76/121,505.70 = 31,086.90/x
  3. Step 3: Cross multiply
    81,001.76x = 121,505.70 × 31,086.90
  4. Step 4: Simplify right side
    81,001.76x = 3,777,235,545.33
  5. Step 5: Solve for x
    x = 3,777,235,545.33/81,001.76
  6. Step 6: Final answer
    x = 46,631.53

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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.