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Finding the Fourth Proportional to 170.33, 255.51 and 67.65

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Solution

The fourth proportional to 170.33, 255.51 and 67.65 is: 101.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.33 : 255.51 = 67.65 : x
  2. Step 2: Convert to fraction form
    170.33/255.51 = 67.65/x
  3. Step 3: Cross multiply
    170.33x = 255.51 × 67.65
  4. Step 4: Simplify right side
    170.33x = 17,285.25
  5. Step 5: Solve for x
    x = 17,285.25/170.33
  6. Step 6: Final answer
    x = 101.48

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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.