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Finding the Fourth Proportional to 119.62, 179.30 and 68.15

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Solution

The fourth proportional to 119.62, 179.30 and 68.15 is: 102.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.62 : 179.30 = 68.15 : x
  2. Step 2: Convert to fraction form
    119.62/179.30 = 68.15/x
  3. Step 3: Cross multiply
    119.62x = 179.30 × 68.15
  4. Step 4: Simplify right side
    119.62x = 12,219.75
  5. Step 5: Solve for x
    x = 12,219.75/119.62
  6. Step 6: Final answer
    x = 102.15

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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.