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Finding the Fourth Proportional to 311,939.86, 467,909.88 and 87,333.38

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Solution

The fourth proportional to 311,939.86, 467,909.88 and 87,333.38 is: 131,000.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,939.86 : 467,909.88 = 87,333.38 : x
  2. Step 2: Convert to fraction form
    311,939.86/467,909.88 = 87,333.38/x
  3. Step 3: Cross multiply
    311,939.86x = 467,909.88 × 87,333.38
  4. Step 4: Simplify right side
    311,939.86x = 40,864,151,355.79
  5. Step 5: Solve for x
    x = 40,864,151,355.79/311,939.86
  6. Step 6: Final answer
    x = 131,000.10

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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.