Home / 129,377.96-178,540.82-72,789.64

Finding the Fourth Proportional to 129,377.96, 178,540.82 and 72,789.64

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Solution

The fourth proportional to 129,377.96, 178,540.82 and 72,789.64 is: 100,449.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,377.96 : 178,540.82 = 72,789.64 : x
  2. Step 2: Convert to fraction form
    129,377.96/178,540.82 = 72,789.64/x
  3. Step 3: Cross multiply
    129,377.96x = 178,540.82 × 72,789.64
  4. Step 4: Simplify right side
    129,377.96x = 12,995,922,013.10
  5. Step 5: Solve for x
    x = 12,995,922,013.10/129,377.96
  6. Step 6: Final answer
    x = 100,449.27

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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.