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Finding the Fourth Proportional to 170.33, 255.23 and 77.79

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Solution

The fourth proportional to 170.33, 255.23 and 77.79 is: 116.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.33 : 255.23 = 77.79 : x
  2. Step 2: Convert to fraction form
    170.33/255.23 = 77.79/x
  3. Step 3: Cross multiply
    170.33x = 255.23 × 77.79
  4. Step 4: Simplify right side
    170.33x = 19,853.26
  5. Step 5: Solve for x
    x = 19,853.26/170.33
  6. Step 6: Final answer
    x = 116.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.