Home / 87,691.41-121,021.29-51,875.64

Finding the Fourth Proportional to 87,691.41, 121,021.29 and 51,875.64

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Solution

The fourth proportional to 87,691.41, 121,021.29 and 51,875.64 is: 71,592.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,691.41 : 121,021.29 = 51,875.64 : x
  2. Step 2: Convert to fraction form
    87,691.41/121,021.29 = 51,875.64/x
  3. Step 3: Cross multiply
    87,691.41x = 121,021.29 × 51,875.64
  4. Step 4: Simplify right side
    87,691.41x = 6,278,056,872.38
  5. Step 5: Solve for x
    x = 6,278,056,872.38/87,691.41
  6. Step 6: Final answer
    x = 71,592.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.