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Finding the Fourth Proportional to 129,311.55, 193,967.55 and 40,571.87

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Solution

The fourth proportional to 129,311.55, 193,967.55 and 40,571.87 is: 60,857.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,311.55 : 193,967.55 = 40,571.87 : x
  2. Step 2: Convert to fraction form
    129,311.55/193,967.55 = 40,571.87/x
  3. Step 3: Cross multiply
    129,311.55x = 193,967.55 × 40,571.87
  4. Step 4: Simplify right side
    129,311.55x = 7,869,625,252.98
  5. Step 5: Solve for x
    x = 7,869,625,252.98/129,311.55
  6. Step 6: Final answer
    x = 60,857.87

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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.