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Finding the Fourth Proportional to 229.99, 344.96 and 81.73

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Solution

The fourth proportional to 229.99, 344.96 and 81.73 is: 122.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.99 : 344.96 = 81.73 : x
  2. Step 2: Convert to fraction form
    229.99/344.96 = 81.73/x
  3. Step 3: Cross multiply
    229.99x = 344.96 × 81.73
  4. Step 4: Simplify right side
    229.99x = 28,191.97
  5. Step 5: Solve for x
    x = 28,191.97/229.99
  6. Step 6: Final answer
    x = 122.58

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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.