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Finding the Fourth Proportional to 225,979.45, 338,988.88 and 74,131

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Solution

The fourth proportional to 225,979.45, 338,988.88 and 74,131 is: 111,202.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,979.45 : 338,988.88 = 74,131 : x
  2. Step 2: Convert to fraction form
    225,979.45/338,988.88 = 74,131/x
  3. Step 3: Cross multiply
    225,979.45x = 338,988.88 × 74,131
  4. Step 4: Simplify right side
    225,979.45x = 25,129,584,663.28
  5. Step 5: Solve for x
    x = 25,129,584,663.28/225,979.45
  6. Step 6: Final answer
    x = 111,202.96

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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.