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Finding the Fourth Proportional to 351,425.86, 527,134.13 and 85,188.78

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Solution

The fourth proportional to 351,425.86, 527,134.13 and 85,188.78 is: 127,782.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,425.86 : 527,134.13 = 85,188.78 : x
  2. Step 2: Convert to fraction form
    351,425.86/527,134.13 = 85,188.78/x
  3. Step 3: Cross multiply
    351,425.86x = 527,134.13 × 85,188.78
  4. Step 4: Simplify right side
    351,425.86x = 44,905,913,324.58
  5. Step 5: Solve for x
    x = 44,905,913,324.58/351,425.86
  6. Step 6: Final answer
    x = 127,782.04

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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.