Home / 129,989.40-179,382.13-72,625.20

Finding the Fourth Proportional to 129,989.40, 179,382.13 and 72,625.20

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Solution

The fourth proportional to 129,989.40, 179,382.13 and 72,625.20 is: 100,220.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,989.40 : 179,382.13 = 72,625.20 : x
  2. Step 2: Convert to fraction form
    129,989.40/179,382.13 = 72,625.20/x
  3. Step 3: Cross multiply
    129,989.40x = 179,382.13 × 72,625.20
  4. Step 4: Simplify right side
    129,989.40x = 13,027,663,067.68
  5. Step 5: Solve for x
    x = 13,027,663,067.68/129,989.40
  6. Step 6: Final answer
    x = 100,220.96

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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.