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Finding the Fourth Proportional to 160.98, 221.10 and 142.55

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Solution

The fourth proportional to 160.98, 221.10 and 142.55 is: 195.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.98 : 221.10 = 142.55 : x
  2. Step 2: Convert to fraction form
    160.98/221.10 = 142.55/x
  3. Step 3: Cross multiply
    160.98x = 221.10 × 142.55
  4. Step 4: Simplify right side
    160.98x = 31,516.70
  5. Step 5: Solve for x
    x = 31,516.70/160.98
  6. Step 6: Final answer
    x = 195.78

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.