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Finding the Fourth Proportional to 148.11, 221.76 and 111.53

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Solution

The fourth proportional to 148.11, 221.76 and 111.53 is: 166.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.11 : 221.76 = 111.53 : x
  2. Step 2: Convert to fraction form
    148.11/221.76 = 111.53/x
  3. Step 3: Cross multiply
    148.11x = 221.76 × 111.53
  4. Step 4: Simplify right side
    148.11x = 24,731.78
  5. Step 5: Solve for x
    x = 24,731.78/148.11
  6. Step 6: Final answer
    x = 166.98

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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.