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Finding the Fourth Proportional to 104.54, 155.96 and 98.15

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Solution

The fourth proportional to 104.54, 155.96 and 98.15 is: 146.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.54 : 155.96 = 98.15 : x
  2. Step 2: Convert to fraction form
    104.54/155.96 = 98.15/x
  3. Step 3: Cross multiply
    104.54x = 155.96 × 98.15
  4. Step 4: Simplify right side
    104.54x = 15,306.20
  5. Step 5: Solve for x
    x = 15,306.20/104.54
  6. Step 6: Final answer
    x = 146.42

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.