Home / 87,910.30-121,371.24-67,728.88

Finding the Fourth Proportional to 87,910.30, 121,371.24 and 67,728.88

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Solution

The fourth proportional to 87,910.30, 121,371.24 and 67,728.88 is: 93,508.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,910.30 : 121,371.24 = 67,728.88 : x
  2. Step 2: Convert to fraction form
    87,910.30/121,371.24 = 67,728.88/x
  3. Step 3: Cross multiply
    87,910.30x = 121,371.24 × 67,728.88
  4. Step 4: Simplify right side
    87,910.30x = 8,220,338,149.41
  5. Step 5: Solve for x
    x = 8,220,338,149.41/87,910.30
  6. Step 6: Final answer
    x = 93,508.25

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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.