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Finding the Fourth Proportional to 147.53, 221.09 and 111.42

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Solution

The fourth proportional to 147.53, 221.09 and 111.42 is: 166.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.53 : 221.09 = 111.42 : x
  2. Step 2: Convert to fraction form
    147.53/221.09 = 111.42/x
  3. Step 3: Cross multiply
    147.53x = 221.09 × 111.42
  4. Step 4: Simplify right side
    147.53x = 24,633.29
  5. Step 5: Solve for x
    x = 24,633.29/147.53
  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.