Home / 129,158.25-178,194.33-80,727.13

Finding the Fourth Proportional to 129,158.25, 178,194.33 and 80,727.13

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Solution

The fourth proportional to 129,158.25, 178,194.33 and 80,727.13 is: 111,375.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,158.25 : 178,194.33 = 80,727.13 : x
  2. Step 2: Convert to fraction form
    129,158.25/178,194.33 = 80,727.13/x
  3. Step 3: Cross multiply
    129,158.25x = 178,194.33 × 80,727.13
  4. Step 4: Simplify right side
    129,158.25x = 14,385,117,065.92
  5. Step 5: Solve for x
    x = 14,385,117,065.92/129,158.25
  6. Step 6: Final answer
    x = 111,375.91

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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.