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Finding the Fourth Proportional to 118.22, 176.24 and 115.49

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Solution

The fourth proportional to 118.22, 176.24 and 115.49 is: 172.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.22 : 176.24 = 115.49 : x
  2. Step 2: Convert to fraction form
    118.22/176.24 = 115.49/x
  3. Step 3: Cross multiply
    118.22x = 176.24 × 115.49
  4. Step 4: Simplify right side
    118.22x = 20,352.50
  5. Step 5: Solve for x
    x = 20,352.50/118.22
  6. Step 6: Final answer
    x = 172.17

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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.