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Finding the Fourth Proportional to 195.74, 270.11 and 112.85

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Solution

The fourth proportional to 195.74, 270.11 and 112.85 is: 155.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    195.74 : 270.11 = 112.85 : x
  2. Step 2: Convert to fraction form
    195.74/270.11 = 112.85/x
  3. Step 3: Cross multiply
    195.74x = 270.11 × 112.85
  4. Step 4: Simplify right side
    195.74x = 30,480.00
  5. Step 5: Solve for x
    x = 30,480.00/195.74
  6. Step 6: Final answer
    x = 155.72

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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.