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Finding the Fourth Proportional to 116.92, 161.16 and 108.76

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Solution

The fourth proportional to 116.92, 161.16 and 108.76 is: 149.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.92 : 161.16 = 108.76 : x
  2. Step 2: Convert to fraction form
    116.92/161.16 = 108.76/x
  3. Step 3: Cross multiply
    116.92x = 161.16 × 108.76
  4. Step 4: Simplify right side
    116.92x = 17,527.76
  5. Step 5: Solve for x
    x = 17,527.76/116.92
  6. Step 6: Final answer
    x = 149.91

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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.