Home / 81,255.20-121,587.35-67,083.44

Finding the Fourth Proportional to 81,255.20, 121,587.35 and 67,083.44

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Solution

The fourth proportional to 81,255.20, 121,587.35 and 67,083.44 is: 100,381.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,255.20 : 121,587.35 = 67,083.44 : x
  2. Step 2: Convert to fraction form
    81,255.20/121,587.35 = 67,083.44/x
  3. Step 3: Cross multiply
    81,255.20x = 121,587.35 × 67,083.44
  4. Step 4: Simplify right side
    81,255.20x = 8,156,496,755.13
  5. Step 5: Solve for x
    x = 8,156,496,755.13/81,255.20
  6. Step 6: Final answer
    x = 100,381.23

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1.5x scale

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.