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Finding the Fourth Proportional to 119.60, 178.25 and 115.44

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Solution

The fourth proportional to 119.60, 178.25 and 115.44 is: 172.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.60 : 178.25 = 115.44 : x
  2. Step 2: Convert to fraction form
    119.60/178.25 = 115.44/x
  3. Step 3: Cross multiply
    119.60x = 178.25 × 115.44
  4. Step 4: Simplify right side
    119.60x = 20,576.60
  5. Step 5: Solve for x
    x = 20,576.60/119.60
  6. Step 6: Final answer
    x = 172.05

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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.