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Finding the Fourth Proportional to 74.96, 112.46 and 55.85

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Solution

The fourth proportional to 74.96, 112.46 and 55.85 is: 83.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.96 : 112.46 = 55.85 : x
  2. Step 2: Convert to fraction form
    74.96/112.46 = 55.85/x
  3. Step 3: Cross multiply
    74.96x = 112.46 × 55.85
  4. Step 4: Simplify right side
    74.96x = 6,280.05
  5. Step 5: Solve for x
    x = 6,280.05/74.96
  6. Step 6: Final answer
    x = 83.78

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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.