Home / 87,347.40-131,021.10-80,932.20

Finding the Fourth Proportional to 87,347.40, 131,021.10 and 80,932.20

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Solution

The fourth proportional to 87,347.40, 131,021.10 and 80,932.20 is: 121,398.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,347.40 : 131,021.10 = 80,932.20 : x
  2. Step 2: Convert to fraction form
    87,347.40/131,021.10 = 80,932.20/x
  3. Step 3: Cross multiply
    87,347.40x = 131,021.10 × 80,932.20
  4. Step 4: Simplify right side
    87,347.40x = 10,603,825,869.42
  5. Step 5: Solve for x
    x = 10,603,825,869.42/87,347.40
  6. Step 6: Final answer
    x = 121,398.30

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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.