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Finding the Fourth Proportional to 185.19, 255.65 and 123.11

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Solution

The fourth proportional to 185.19, 255.65 and 123.11 is: 169.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.19 : 255.65 = 123.11 : x
  2. Step 2: Convert to fraction form
    185.19/255.65 = 123.11/x
  3. Step 3: Cross multiply
    185.19x = 255.65 × 123.11
  4. Step 4: Simplify right side
    185.19x = 31,471.18
  5. Step 5: Solve for x
    x = 31,471.18/185.19
  6. Step 6: Final answer
    x = 169.94

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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.