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Finding the Fourth Proportional to 185.73, 256.28 and 123.69

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Solution

The fourth proportional to 185.73, 256.28 and 123.69 is: 170.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.73 : 256.28 = 123.69 : x
  2. Step 2: Convert to fraction form
    185.73/256.28 = 123.69/x
  3. Step 3: Cross multiply
    185.73x = 256.28 × 123.69
  4. Step 4: Simplify right side
    185.73x = 31,699.27
  5. Step 5: Solve for x
    x = 31,699.27/185.73
  6. Step 6: Final answer
    x = 170.67

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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.