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Finding the Fourth Proportional to 185.07, 255.50 and 122.99

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Solution

The fourth proportional to 185.07, 255.50 and 122.99 is: 169.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.07 : 255.50 = 122.99 : x
  2. Step 2: Convert to fraction form
    185.07/255.50 = 122.99/x
  3. Step 3: Cross multiply
    185.07x = 255.50 × 122.99
  4. Step 4: Simplify right side
    185.07x = 31,422.97
  5. Step 5: Solve for x
    x = 31,422.97/185.07
  6. Step 6: Final answer
    x = 169.79

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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.