Home / 129,325.16-178,467.01-72,736.54

Finding the Fourth Proportional to 129,325.16, 178,467.01 and 72,736.54

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Solution

The fourth proportional to 129,325.16, 178,467.01 and 72,736.54 is: 100,375.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,325.16 : 178,467.01 = 72,736.54 : x
  2. Step 2: Convert to fraction form
    129,325.16/178,467.01 = 72,736.54/x
  3. Step 3: Cross multiply
    129,325.16x = 178,467.01 × 72,736.54
  4. Step 4: Simplify right side
    129,325.16x = 12,981,072,811.55
  5. Step 5: Solve for x
    x = 12,981,072,811.55/129,325.16
  6. Step 6: Final answer
    x = 100,375.46

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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.