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Finding the Fourth Proportional to 170.85, 256.29 and 68.11

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Solution

The fourth proportional to 170.85, 256.29 and 68.11 is: 102.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.85 : 256.29 = 68.11 : x
  2. Step 2: Convert to fraction form
    170.85/256.29 = 68.11/x
  3. Step 3: Cross multiply
    170.85x = 256.29 × 68.11
  4. Step 4: Simplify right side
    170.85x = 17,455.91
  5. Step 5: Solve for x
    x = 17,455.91/170.85
  6. Step 6: Final answer
    x = 102.17

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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.