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Finding the Fourth Proportional to 160.38, 221.22 and 102.15

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Solution

The fourth proportional to 160.38, 221.22 and 102.15 is: 140.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.38 : 221.22 = 102.15 : x
  2. Step 2: Convert to fraction form
    160.38/221.22 = 102.15/x
  3. Step 3: Cross multiply
    160.38x = 221.22 × 102.15
  4. Step 4: Simplify right side
    160.38x = 22,597.62
  5. Step 5: Solve for x
    x = 22,597.62/160.38
  6. Step 6: Final answer
    x = 140.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.