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Finding the Fourth Proportional to 195.47, 269.75 and 108.15

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Solution

The fourth proportional to 195.47, 269.75 and 108.15 is: 149.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    195.47 : 269.75 = 108.15 : x
  2. Step 2: Convert to fraction form
    195.47/269.75 = 108.15/x
  3. Step 3: Cross multiply
    195.47x = 269.75 × 108.15
  4. Step 4: Simplify right side
    195.47x = 29,173.73
  5. Step 5: Solve for x
    x = 29,173.73/195.47
  6. Step 6: Final answer
    x = 149.25

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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.