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Finding the Fourth Proportional to 119.16, 178.59 and 67.83

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Solution

The fourth proportional to 119.16, 178.59 and 67.83 is: 101.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.16 : 178.59 = 67.83 : x
  2. Step 2: Convert to fraction form
    119.16/178.59 = 67.83/x
  3. Step 3: Cross multiply
    119.16x = 178.59 × 67.83
  4. Step 4: Simplify right side
    119.16x = 12,112.87
  5. Step 5: Solve for x
    x = 12,112.87/119.16
  6. Step 6: Final answer
    x = 101.66

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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.