Home / 87,343.20-131,072.40-31,939.20

Finding the Fourth Proportional to 87,343.20, 131,072.40 and 31,939.20

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Solution

The fourth proportional to 87,343.20, 131,072.40 and 31,939.20 is: 47,929.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,343.20 : 131,072.40 = 31,939.20 : x
  2. Step 2: Convert to fraction form
    87,343.20/131,072.40 = 31,939.20/x
  3. Step 3: Cross multiply
    87,343.20x = 131,072.40 × 31,939.20
  4. Step 4: Simplify right side
    87,343.20x = 4,186,347,598.08
  5. Step 5: Solve for x
    x = 4,186,347,598.08/87,343.20
  6. Step 6: Final answer
    x = 47,929.86

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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.