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Finding the Fourth Proportional to 225,939.62, 338,672.91 and 76,128.14

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Solution

The fourth proportional to 225,939.62, 338,672.91 and 76,128.14 is: 114,112.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,939.62 : 338,672.91 = 76,128.14 : x
  2. Step 2: Convert to fraction form
    225,939.62/338,672.91 = 76,128.14/x
  3. Step 3: Cross multiply
    225,939.62x = 338,672.91 × 76,128.14
  4. Step 4: Simplify right side
    225,939.62x = 25,782,538,706.69
  5. Step 5: Solve for x
    x = 25,782,538,706.69/225,939.62
  6. Step 6: Final answer
    x = 114,112.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.