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Finding the Fourth Proportional to 195.50, 269.79 and 112.61

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Solution

The fourth proportional to 195.50, 269.79 and 112.61 is: 155.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    195.50 : 269.79 = 112.61 : x
  2. Step 2: Convert to fraction form
    195.50/269.79 = 112.61/x
  3. Step 3: Cross multiply
    195.50x = 269.79 × 112.61
  4. Step 4: Simplify right side
    195.50x = 30,379.70
  5. Step 5: Solve for x
    x = 30,379.70/195.50
  6. Step 6: Final answer
    x = 155.40

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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.