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Finding the Fourth Proportional to 154.88, 213.81 and 119.83

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Solution

The fourth proportional to 154.88, 213.81 and 119.83 is: 165.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.88 : 213.81 = 119.83 : x
  2. Step 2: Convert to fraction form
    154.88/213.81 = 119.83/x
  3. Step 3: Cross multiply
    154.88x = 213.81 × 119.83
  4. Step 4: Simplify right side
    154.88x = 25,619.18
  5. Step 5: Solve for x
    x = 25,619.18/154.88
  6. Step 6: Final answer
    x = 165.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.