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Finding the Fourth Proportional to 104.13, 155.94 and 79.73

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Solution

The fourth proportional to 104.13, 155.94 and 79.73 is: 119.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.13 : 155.94 = 79.73 : x
  2. Step 2: Convert to fraction form
    104.13/155.94 = 79.73/x
  3. Step 3: Cross multiply
    104.13x = 155.94 × 79.73
  4. Step 4: Simplify right side
    104.13x = 12,432.32
  5. Step 5: Solve for x
    x = 12,432.32/104.13
  6. Step 6: Final answer
    x = 119.39

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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.