Home / 87,862.31-131,712.76-31,689.21

Finding the Fourth Proportional to 87,862.31, 131,712.76 and 31,689.21

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Solution

The fourth proportional to 87,862.31, 131,712.76 and 31,689.21 is: 47,504.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,862.31 : 131,712.76 = 31,689.21 : x
  2. Step 2: Convert to fraction form
    87,862.31/131,712.76 = 31,689.21/x
  3. Step 3: Cross multiply
    87,862.31x = 131,712.76 × 31,689.21
  4. Step 4: Simplify right side
    87,862.31x = 4,173,873,311.32
  5. Step 5: Solve for x
    x = 4,173,873,311.32/87,862.31
  6. Step 6: Final answer
    x = 47,504.71

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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.