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Finding the Fourth Proportional to 90,339.05, 135,540.02 and 40,424.42

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Solution

The fourth proportional to 90,339.05, 135,540.02 and 40,424.42 is: 60,650.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,339.05 : 135,540.02 = 40,424.42 : x
  2. Step 2: Convert to fraction form
    90,339.05/135,540.02 = 40,424.42/x
  3. Step 3: Cross multiply
    90,339.05x = 135,540.02 × 40,424.42
  4. Step 4: Simplify right side
    90,339.05x = 5,479,126,493.17
  5. Step 5: Solve for x
    x = 5,479,126,493.17/90,339.05
  6. Step 6: Final answer
    x = 60,650.70

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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.