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Finding the Fourth Proportional to 185.02, 255.33 and 122.86

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Solution

The fourth proportional to 185.02, 255.33 and 122.86 is: 169.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.02 : 255.33 = 122.86 : x
  2. Step 2: Convert to fraction form
    185.02/255.33 = 122.86/x
  3. Step 3: Cross multiply
    185.02x = 255.33 × 122.86
  4. Step 4: Simplify right side
    185.02x = 31,369.84
  5. Step 5: Solve for x
    x = 31,369.84/185.02
  6. Step 6: Final answer
    x = 169.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.