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Finding the Fourth Proportional to 106.88, 160.08 and 80.96

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Solution

The fourth proportional to 106.88, 160.08 and 80.96 is: 121.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.88 : 160.08 = 80.96 : x
  2. Step 2: Convert to fraction form
    106.88/160.08 = 80.96/x
  3. Step 3: Cross multiply
    106.88x = 160.08 × 80.96
  4. Step 4: Simplify right side
    106.88x = 12,960.08
  5. Step 5: Solve for x
    x = 12,960.08/106.88
  6. Step 6: Final answer
    x = 121.26

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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.