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Finding the Fourth Proportional to 160.55, 221.78 and 143.14

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Solution

The fourth proportional to 160.55, 221.78 and 143.14 is: 197.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.55 : 221.78 = 143.14 : x
  2. Step 2: Convert to fraction form
    160.55/221.78 = 143.14/x
  3. Step 3: Cross multiply
    160.55x = 221.78 × 143.14
  4. Step 4: Simplify right side
    160.55x = 31,743.76
  5. Step 5: Solve for x
    x = 31,743.76/160.55
  6. Step 6: Final answer
    x = 197.72

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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.