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Finding the Fourth Proportional to 122.78, 184.37 and 111.03

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Solution

The fourth proportional to 122.78, 184.37 and 111.03 is: 166.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.78 : 184.37 = 111.03 : x
  2. Step 2: Convert to fraction form
    122.78/184.37 = 111.03/x
  3. Step 3: Cross multiply
    122.78x = 184.37 × 111.03
  4. Step 4: Simplify right side
    122.78x = 20,470.92
  5. Step 5: Solve for x
    x = 20,470.92/122.78
  6. Step 6: Final answer
    x = 166.73

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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.