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Finding the Fourth Proportional to 120.48, 167.04 and 115.44

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Solution

The fourth proportional to 120.48, 167.04 and 115.44 is: 160.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    120.48 : 167.04 = 115.44 : x
  2. Step 2: Convert to fraction form
    120.48/167.04 = 115.44/x
  3. Step 3: Cross multiply
    120.48x = 167.04 × 115.44
  4. Step 4: Simplify right side
    120.48x = 19,283.10
  5. Step 5: Solve for x
    x = 19,283.10/120.48
  6. Step 6: Final answer
    x = 160.05

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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.