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Finding the Fourth Proportional to 151.48, 209.24 and 122.48

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Solution

The fourth proportional to 151.48, 209.24 and 122.48 is: 169.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.48 : 209.24 = 122.48 : x
  2. Step 2: Convert to fraction form
    151.48/209.24 = 122.48/x
  3. Step 3: Cross multiply
    151.48x = 209.24 × 122.48
  4. Step 4: Simplify right side
    151.48x = 25,627.72
  5. Step 5: Solve for x
    x = 25,627.72/151.48
  6. Step 6: Final answer
    x = 169.18

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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.