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Finding the Fourth Proportional to 351,423.87, 527,131.10 and 85,186.65

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Solution

The fourth proportional to 351,423.87, 527,131.10 and 85,186.65 is: 127,778.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,423.87 : 527,131.10 = 85,186.65 : x
  2. Step 2: Convert to fraction form
    351,423.87/527,131.10 = 85,186.65/x
  3. Step 3: Cross multiply
    351,423.87x = 527,131.10 × 85,186.65
  4. Step 4: Simplify right side
    351,423.87x = 44,904,532,093.88
  5. Step 5: Solve for x
    x = 44,904,532,093.88/351,423.87
  6. Step 6: Final answer
    x = 127,778.83

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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.