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Finding the Fourth Proportional to 116.92, 161.36 and 65.18

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Solution

The fourth proportional to 116.92, 161.36 and 65.18 is: 89.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.92 : 161.36 = 65.18 : x
  2. Step 2: Convert to fraction form
    116.92/161.36 = 65.18/x
  3. Step 3: Cross multiply
    116.92x = 161.36 × 65.18
  4. Step 4: Simplify right side
    116.92x = 10,517.44
  5. Step 5: Solve for x
    x = 10,517.44/116.92
  6. Step 6: Final answer
    x = 89.95

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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.