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Finding the Fourth Proportional to 116.16, 173.20 and 99.12

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Solution

The fourth proportional to 116.16, 173.20 and 99.12 is: 147.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.16 : 173.20 = 99.12 : x
  2. Step 2: Convert to fraction form
    116.16/173.20 = 99.12/x
  3. Step 3: Cross multiply
    116.16x = 173.20 × 99.12
  4. Step 4: Simplify right side
    116.16x = 17,167.58
  5. Step 5: Solve for x
    x = 17,167.58/116.16
  6. Step 6: Final answer
    x = 147.79

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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.