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Finding the Fourth Proportional to 116.20, 160.31 and 69.55

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Solution

The fourth proportional to 116.20, 160.31 and 69.55 is: 95.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.20 : 160.31 = 69.55 : x
  2. Step 2: Convert to fraction form
    116.20/160.31 = 69.55/x
  3. Step 3: Cross multiply
    116.20x = 160.31 × 69.55
  4. Step 4: Simplify right side
    116.20x = 11,149.56
  5. Step 5: Solve for x
    x = 11,149.56/116.20
  6. Step 6: Final answer
    x = 95.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.