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Finding the Fourth Proportional to 122.94, 185.02 and 111.74

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Solution

The fourth proportional to 122.94, 185.02 and 111.74 is: 168.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.94 : 185.02 = 111.74 : x
  2. Step 2: Convert to fraction form
    122.94/185.02 = 111.74/x
  3. Step 3: Cross multiply
    122.94x = 185.02 × 111.74
  4. Step 4: Simplify right side
    122.94x = 20,674.13
  5. Step 5: Solve for x
    x = 20,674.13/122.94
  6. Step 6: Final answer
    x = 168.16

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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.