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Finding the Fourth Proportional to 129,410.70, 194,135.62 and 40,655.85

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Solution

The fourth proportional to 129,410.70, 194,135.62 and 40,655.85 is: 60,989.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,410.70 : 194,135.62 = 40,655.85 : x
  2. Step 2: Convert to fraction form
    129,410.70/194,135.62 = 40,655.85/x
  3. Step 3: Cross multiply
    129,410.70x = 194,135.62 × 40,655.85
  4. Step 4: Simplify right side
    129,410.70x = 7,892,748,646.38
  5. Step 5: Solve for x
    x = 7,892,748,646.38/129,410.70
  6. Step 6: Final answer
    x = 60,989.92

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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.