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Finding the Fourth Proportional to 122.87, 183.20 and 112.50

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Solution

The fourth proportional to 122.87, 183.20 and 112.50 is: 167.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.87 : 183.20 = 112.50 : x
  2. Step 2: Convert to fraction form
    122.87/183.20 = 112.50/x
  3. Step 3: Cross multiply
    122.87x = 183.20 × 112.50
  4. Step 4: Simplify right side
    122.87x = 20,609.44
  5. Step 5: Solve for x
    x = 20,609.44/122.87
  6. Step 6: Final answer
    x = 167.74

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.