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Finding the Fourth Proportional to 113.52, 155.79 and 104.28

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Solution

The fourth proportional to 113.52, 155.79 and 104.28 is: 143.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.52 : 155.79 = 104.28 : x
  2. Step 2: Convert to fraction form
    113.52/155.79 = 104.28/x
  3. Step 3: Cross multiply
    113.52x = 155.79 × 104.28
  4. Step 4: Simplify right side
    113.52x = 16,245.78
  5. Step 5: Solve for x
    x = 16,245.78/113.52
  6. Step 6: Final answer
    x = 143.11

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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.