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Finding the Fourth Proportional to 170.18, 255.38 and 83.57

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Solution

The fourth proportional to 170.18, 255.38 and 83.57 is: 125.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.18 : 255.38 = 83.57 : x
  2. Step 2: Convert to fraction form
    170.18/255.38 = 83.57/x
  3. Step 3: Cross multiply
    170.18x = 255.38 × 83.57
  4. Step 4: Simplify right side
    170.18x = 21,341.72
  5. Step 5: Solve for x
    x = 21,341.72/170.18
  6. Step 6: Final answer
    x = 125.41

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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.