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Finding the Fourth Proportional to 104.11, 155.17 and 103.26

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Solution

The fourth proportional to 104.11, 155.17 and 103.26 is: 153.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.11 : 155.17 = 103.26 : x
  2. Step 2: Convert to fraction form
    104.11/155.17 = 103.26/x
  3. Step 3: Cross multiply
    104.11x = 155.17 × 103.26
  4. Step 4: Simplify right side
    104.11x = 16,022.85
  5. Step 5: Solve for x
    x = 16,022.85/104.11
  6. Step 6: Final answer
    x = 153.90

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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.