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Finding the Fourth Proportional to 119.34, 178.80 and 94.86

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Solution

The fourth proportional to 119.34, 178.80 and 94.86 is: 142.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.34 : 178.80 = 94.86 : x
  2. Step 2: Convert to fraction form
    119.34/178.80 = 94.86/x
  3. Step 3: Cross multiply
    119.34x = 178.80 × 94.86
  4. Step 4: Simplify right side
    119.34x = 16,960.97
  5. Step 5: Solve for x
    x = 16,960.97/119.34
  6. Step 6: Final answer
    x = 142.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.