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Finding the Fourth Proportional to 239.75, 330.87 and 136.25

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Solution

The fourth proportional to 239.75, 330.87 and 136.25 is: 188.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.75 : 330.87 = 136.25 : x
  2. Step 2: Convert to fraction form
    239.75/330.87 = 136.25/x
  3. Step 3: Cross multiply
    239.75x = 330.87 × 136.25
  4. Step 4: Simplify right side
    239.75x = 45,081.04
  5. Step 5: Solve for x
    x = 45,081.04/239.75
  6. Step 6: Final answer
    x = 188.03

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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.