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Finding the Fourth Proportional to 119.85, 179.47 and 106.28

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Solution

The fourth proportional to 119.85, 179.47 and 106.28 is: 159.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.85 : 179.47 = 106.28 : x
  2. Step 2: Convert to fraction form
    119.85/179.47 = 106.28/x
  3. Step 3: Cross multiply
    119.85x = 179.47 × 106.28
  4. Step 4: Simplify right side
    119.85x = 19,074.65
  5. Step 5: Solve for x
    x = 19,074.65/119.85
  6. Step 6: Final answer
    x = 159.15

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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.