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Finding the Fourth Proportional to 111.44, 167.40 and 54.56

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Solution

The fourth proportional to 111.44, 167.40 and 54.56 is: 81.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    111.44 : 167.40 = 54.56 : x
  2. Step 2: Convert to fraction form
    111.44/167.40 = 54.56/x
  3. Step 3: Cross multiply
    111.44x = 167.40 × 54.56
  4. Step 4: Simplify right side
    111.44x = 9,133.34
  5. Step 5: Solve for x
    x = 9,133.34/111.44
  6. Step 6: Final answer
    x = 81.96

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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.