Home / 87,731.64-131,616.90-40,959

Finding the Fourth Proportional to 87,731.64, 131,616.90 and 40,959

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Solution

The fourth proportional to 87,731.64, 131,616.90 and 40,959 is: 61,447.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,731.64 : 131,616.90 = 40,959 : x
  2. Step 2: Convert to fraction form
    87,731.64/131,616.90 = 40,959/x
  3. Step 3: Cross multiply
    87,731.64x = 131,616.90 × 40,959
  4. Step 4: Simplify right side
    87,731.64x = 5,390,896,607.10
  5. Step 5: Solve for x
    x = 5,390,896,607.10/87,731.64
  6. Step 6: Final answer
    x = 61,447.58

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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.