Home / 87,439.80-131,159.70-54,262.20

Finding the Fourth Proportional to 87,439.80, 131,159.70 and 54,262.20

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Solution

The fourth proportional to 87,439.80, 131,159.70 and 54,262.20 is: 81,393.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,439.80 : 131,159.70 = 54,262.20 : x
  2. Step 2: Convert to fraction form
    87,439.80/131,159.70 = 54,262.20/x
  3. Step 3: Cross multiply
    87,439.80x = 131,159.70 × 54,262.20
  4. Step 4: Simplify right side
    87,439.80x = 7,117,013,873.34
  5. Step 5: Solve for x
    x = 7,117,013,873.34/87,439.80
  6. Step 6: Final answer
    x = 81,393.30

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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.