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Finding the Fourth Proportional to 123.28, 185.76 and 116.62

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Solution

The fourth proportional to 123.28, 185.76 and 116.62 is: 175.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    123.28 : 185.76 = 116.62 : x
  2. Step 2: Convert to fraction form
    123.28/185.76 = 116.62/x
  3. Step 3: Cross multiply
    123.28x = 185.76 × 116.62
  4. Step 4: Simplify right side
    123.28x = 21,663.33
  5. Step 5: Solve for x
    x = 21,663.33/123.28
  6. Step 6: Final answer
    x = 175.72

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.