Home / 81,352.14-121,691.25-76,375.50

Finding the Fourth Proportional to 81,352.14, 121,691.25 and 76,375.50

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Solution

The fourth proportional to 81,352.14, 121,691.25 and 76,375.50 is: 114,246.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,352.14 : 121,691.25 = 76,375.50 : x
  2. Step 2: Convert to fraction form
    81,352.14/121,691.25 = 76,375.50/x
  3. Step 3: Cross multiply
    81,352.14x = 121,691.25 × 76,375.50
  4. Step 4: Simplify right side
    81,352.14x = 9,294,230,064.38
  5. Step 5: Solve for x
    x = 9,294,230,064.38/81,352.14
  6. Step 6: Final answer
    x = 114,246.90

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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.