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Finding the Fourth Proportional to 195.66, 269.97 and 112.75

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Solution

The fourth proportional to 195.66, 269.97 and 112.75 is: 155.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    195.66 : 269.97 = 112.75 : x
  2. Step 2: Convert to fraction form
    195.66/269.97 = 112.75/x
  3. Step 3: Cross multiply
    195.66x = 269.97 × 112.75
  4. Step 4: Simplify right side
    195.66x = 30,438.44
  5. Step 5: Solve for x
    x = 30,438.44/195.66
  6. Step 6: Final answer
    x = 155.57

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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.