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Finding the Fourth Proportional to 195.89, 270.36 and 111.88

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Solution

The fourth proportional to 195.89, 270.36 and 111.88 is: 154.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    195.89 : 270.36 = 111.88 : x
  2. Step 2: Convert to fraction form
    195.89/270.36 = 111.88/x
  3. Step 3: Cross multiply
    195.89x = 270.36 × 111.88
  4. Step 4: Simplify right side
    195.89x = 30,248.68
  5. Step 5: Solve for x
    x = 30,248.68/195.89
  6. Step 6: Final answer
    x = 154.42

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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.