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Finding the Fourth Proportional to 119.75, 179.46 and 76.28

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Solution

The fourth proportional to 119.75, 179.46 and 76.28 is: 114.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.75 : 179.46 = 76.28 : x
  2. Step 2: Convert to fraction form
    119.75/179.46 = 76.28/x
  3. Step 3: Cross multiply
    119.75x = 179.46 × 76.28
  4. Step 4: Simplify right side
    119.75x = 13,689.66
  5. Step 5: Solve for x
    x = 13,689.66/119.75
  6. Step 6: Final answer
    x = 114.32

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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.