Home / 87,310.20-130,965.30-86,143.80

Finding the Fourth Proportional to 87,310.20, 130,965.30 and 86,143.80

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Solution

The fourth proportional to 87,310.20, 130,965.30 and 86,143.80 is: 129,215.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,310.20 : 130,965.30 = 86,143.80 : x
  2. Step 2: Convert to fraction form
    87,310.20/130,965.30 = 86,143.80/x
  3. Step 3: Cross multiply
    87,310.20x = 130,965.30 × 86,143.80
  4. Step 4: Simplify right side
    87,310.20x = 11,281,848,610.14
  5. Step 5: Solve for x
    x = 11,281,848,610.14/87,310.20
  6. Step 6: Final answer
    x = 129,215.70

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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.