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Finding the Fourth Proportional to 123.96, 187.05 and 118.97

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Solution

The fourth proportional to 123.96, 187.05 and 118.97 is: 179.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    123.96 : 187.05 = 118.97 : x
  2. Step 2: Convert to fraction form
    123.96/187.05 = 118.97/x
  3. Step 3: Cross multiply
    123.96x = 187.05 × 118.97
  4. Step 4: Simplify right side
    123.96x = 22,252.40
  5. Step 5: Solve for x
    x = 22,252.40/123.96
  6. Step 6: Final answer
    x = 179.51

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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.