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Finding the Fourth Proportional to 111.44, 167.15 and 30.28

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Solution

The fourth proportional to 111.44, 167.15 and 30.28 is: 45.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    111.44 : 167.15 = 30.28 : x
  2. Step 2: Convert to fraction form
    111.44/167.15 = 30.28/x
  3. Step 3: Cross multiply
    111.44x = 167.15 × 30.28
  4. Step 4: Simplify right side
    111.44x = 5,060.96
  5. Step 5: Solve for x
    x = 5,060.96/111.44
  6. Step 6: Final answer
    x = 45.41

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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.