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Finding the Fourth Proportional to 151.86, 209.52 and 108.30

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Solution

The fourth proportional to 151.86, 209.52 and 108.30 is: 149.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.86 : 209.52 = 108.30 : x
  2. Step 2: Convert to fraction form
    151.86/209.52 = 108.30/x
  3. Step 3: Cross multiply
    151.86x = 209.52 × 108.30
  4. Step 4: Simplify right side
    151.86x = 22,691.02
  5. Step 5: Solve for x
    x = 22,691.02/151.86
  6. Step 6: Final answer
    x = 149.42

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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.