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Finding the Fourth Proportional to 89,540.70, 134,311.05 and 79,863.90

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Solution

The fourth proportional to 89,540.70, 134,311.05 and 79,863.90 is: 119,795.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,540.70 : 134,311.05 = 79,863.90 : x
  2. Step 2: Convert to fraction form
    89,540.70/134,311.05 = 79,863.90/x
  3. Step 3: Cross multiply
    89,540.70x = 134,311.05 × 79,863.90
  4. Step 4: Simplify right side
    89,540.70x = 10,726,604,266.10
  5. Step 5: Solve for x
    x = 10,726,604,266.10/89,540.70
  6. Step 6: Final answer
    x = 119,795.85

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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.