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Finding the Fourth Proportional to 159,591.10, 220,227.04 and 87,965.50

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Solution

The fourth proportional to 159,591.10, 220,227.04 and 87,965.50 is: 121,387.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,591.10 : 220,227.04 = 87,965.50 : x
  2. Step 2: Convert to fraction form
    159,591.10/220,227.04 = 87,965.50/x
  3. Step 3: Cross multiply
    159,591.10x = 220,227.04 × 87,965.50
  4. Step 4: Simplify right side
    159,591.10x = 19,372,381,687.12
  5. Step 5: Solve for x
    x = 19,372,381,687.12/159,591.10
  6. Step 6: Final answer
    x = 121,387.61

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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.