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Finding the Fourth Proportional to 151.39, 209.28 and 129.52

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Solution

The fourth proportional to 151.39, 209.28 and 129.52 is: 179.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.39 : 209.28 = 129.52 : x
  2. Step 2: Convert to fraction form
    151.39/209.28 = 129.52/x
  3. Step 3: Cross multiply
    151.39x = 209.28 × 129.52
  4. Step 4: Simplify right side
    151.39x = 27,105.95
  5. Step 5: Solve for x
    x = 27,105.95/151.39
  6. Step 6: Final answer
    x = 179.05

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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.