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Finding the Fourth Proportional to 198.18, 297.14 and 111.54

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Solution

The fourth proportional to 198.18, 297.14 and 111.54 is: 167.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.18 : 297.14 = 111.54 : x
  2. Step 2: Convert to fraction form
    198.18/297.14 = 111.54/x
  3. Step 3: Cross multiply
    198.18x = 297.14 × 111.54
  4. Step 4: Simplify right side
    198.18x = 33,142.44
  5. Step 5: Solve for x
    x = 33,142.44/198.18
  6. Step 6: Final answer
    x = 167.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.