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Finding the Fourth Proportional to 116.20, 173.56 and 105.20

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Solution

The fourth proportional to 116.20, 173.56 and 105.20 is: 157.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.20 : 173.56 = 105.20 : x
  2. Step 2: Convert to fraction form
    116.20/173.56 = 105.20/x
  3. Step 3: Cross multiply
    116.20x = 173.56 × 105.20
  4. Step 4: Simplify right side
    116.20x = 18,258.68
  5. Step 5: Solve for x
    x = 18,258.68/116.20
  6. Step 6: Final answer
    x = 157.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.