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Finding the Fourth Proportional to 74.75, 112.11 and 29.08

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Solution

The fourth proportional to 74.75, 112.11 and 29.08 is: 43.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.75 : 112.11 = 29.08 : x
  2. Step 2: Convert to fraction form
    74.75/112.11 = 29.08/x
  3. Step 3: Cross multiply
    74.75x = 112.11 × 29.08
  4. Step 4: Simplify right side
    74.75x = 3,260.16
  5. Step 5: Solve for x
    x = 3,260.16/74.75
  6. Step 6: Final answer
    x = 43.61

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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.