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Finding the Fourth Proportional to 220,755.55, 331,188.68 and 87,591.85

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Solution

The fourth proportional to 220,755.55, 331,188.68 and 87,591.85 is: 131,409.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,755.55 : 331,188.68 = 87,591.85 : x
  2. Step 2: Convert to fraction form
    220,755.55/331,188.68 = 87,591.85/x
  3. Step 3: Cross multiply
    220,755.55x = 331,188.68 × 87,591.85
  4. Step 4: Simplify right side
    220,755.55x = 29,009,428,742.30
  5. Step 5: Solve for x
    x = 29,009,428,742.30/220,755.55
  6. Step 6: Final answer
    x = 131,409.74

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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.