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Finding the Fourth Proportional to 119.37, 178.33 and 84.86

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Solution

The fourth proportional to 119.37, 178.33 and 84.86 is: 126.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.37 : 178.33 = 84.86 : x
  2. Step 2: Convert to fraction form
    119.37/178.33 = 84.86/x
  3. Step 3: Cross multiply
    119.37x = 178.33 × 84.86
  4. Step 4: Simplify right side
    119.37x = 15,133.32
  5. Step 5: Solve for x
    x = 15,133.32/119.37
  6. Step 6: Final answer
    x = 126.78

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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.