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Finding the Fourth Proportional to 188.97, 260.78 and 123.59

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Solution

The fourth proportional to 188.97, 260.78 and 123.59 is: 170.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.97 : 260.78 = 123.59 : x
  2. Step 2: Convert to fraction form
    188.97/260.78 = 123.59/x
  3. Step 3: Cross multiply
    188.97x = 260.78 × 123.59
  4. Step 4: Simplify right side
    188.97x = 32,229.80
  5. Step 5: Solve for x
    x = 32,229.80/188.97
  6. Step 6: Final answer
    x = 170.56

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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.