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Finding the Fourth Proportional to 119.32, 178.93 and 67.90

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Solution

The fourth proportional to 119.32, 178.93 and 67.90 is: 101.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.32 : 178.93 = 67.90 : x
  2. Step 2: Convert to fraction form
    119.32/178.93 = 67.90/x
  3. Step 3: Cross multiply
    119.32x = 178.93 × 67.90
  4. Step 4: Simplify right side
    119.32x = 12,149.35
  5. Step 5: Solve for x
    x = 12,149.35/119.32
  6. Step 6: Final answer
    x = 101.82

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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.