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Finding the Fourth Proportional to 129,324.60, 178,467.30 and 72,736.38

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Solution

The fourth proportional to 129,324.60, 178,467.30 and 72,736.38 is: 100,375.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,324.60 : 178,467.30 = 72,736.38 : x
  2. Step 2: Convert to fraction form
    129,324.60/178,467.30 = 72,736.38/x
  3. Step 3: Cross multiply
    129,324.60x = 178,467.30 × 72,736.38
  4. Step 4: Simplify right side
    129,324.60x = 12,981,065,350.37
  5. Step 5: Solve for x
    x = 12,981,065,350.37/129,324.60
  6. Step 6: Final answer
    x = 100,375.84

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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.