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Finding the Fourth Proportional to 116.97, 162.20 and 115.08

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Solution

The fourth proportional to 116.97, 162.20 and 115.08 is: 159.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.97 : 162.20 = 115.08 : x
  2. Step 2: Convert to fraction form
    116.97/162.20 = 115.08/x
  3. Step 3: Cross multiply
    116.97x = 162.20 × 115.08
  4. Step 4: Simplify right side
    116.97x = 18,665.40
  5. Step 5: Solve for x
    x = 18,665.40/116.97
  6. Step 6: Final answer
    x = 159.57

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.