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Finding the Fourth Proportional to 112.87, 169.37 and 40.73

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Solution

The fourth proportional to 112.87, 169.37 and 40.73 is: 61.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.87 : 169.37 = 40.73 : x
  2. Step 2: Convert to fraction form
    112.87/169.37 = 40.73/x
  3. Step 3: Cross multiply
    112.87x = 169.37 × 40.73
  4. Step 4: Simplify right side
    112.87x = 6,898.24
  5. Step 5: Solve for x
    x = 6,898.24/112.87
  6. Step 6: Final answer
    x = 61.12

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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.