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Finding the Fourth Proportional to 84,145.20, 126,139.87 and 44,155.90

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Solution

The fourth proportional to 84,145.20, 126,139.87 and 44,155.90 is: 66,192.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,145.20 : 126,139.87 = 44,155.90 : x
  2. Step 2: Convert to fraction form
    84,145.20/126,139.87 = 44,155.90/x
  3. Step 3: Cross multiply
    84,145.20x = 126,139.87 × 44,155.90
  4. Step 4: Simplify right side
    84,145.20x = 5,569,819,485.73
  5. Step 5: Solve for x
    x = 5,569,819,485.73/84,145.20
  6. Step 6: Final answer
    x = 66,192.96

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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.