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Finding the Fourth Proportional to 151.75, 209.19 and 130.92

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Solution

The fourth proportional to 151.75, 209.19 and 130.92 is: 180.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.75 : 209.19 = 130.92 : x
  2. Step 2: Convert to fraction form
    151.75/209.19 = 130.92/x
  3. Step 3: Cross multiply
    151.75x = 209.19 × 130.92
  4. Step 4: Simplify right side
    151.75x = 27,387.15
  5. Step 5: Solve for x
    x = 27,387.15/151.75
  6. Step 6: Final answer
    x = 180.48

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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.