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Finding the Fourth Proportional to 87,379, 131,096.34 and 31,218.04

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Solution

The fourth proportional to 87,379, 131,096.34 and 31,218.04 is: 46,837.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,379 : 131,096.34 = 31,218.04 : x
  2. Step 2: Convert to fraction form
    87,379/131,096.34 = 31,218.04/x
  3. Step 3: Cross multiply
    87,379x = 131,096.34 × 31,218.04
  4. Step 4: Simplify right side
    87,379x = 4,092,570,785.97
  5. Step 5: Solve for x
    x = 4,092,570,785.97/87,379
  6. Step 6: Final answer
    x = 46,837.01

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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.