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Finding the Fourth Proportional to 154.89, 231.03 and 131.80

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Solution

The fourth proportional to 154.89, 231.03 and 131.80 is: 196.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.89 : 231.03 = 131.80 : x
  2. Step 2: Convert to fraction form
    154.89/231.03 = 131.80/x
  3. Step 3: Cross multiply
    154.89x = 231.03 × 131.80
  4. Step 4: Simplify right side
    154.89x = 30,449.75
  5. Step 5: Solve for x
    x = 30,449.75/154.89
  6. Step 6: Final answer
    x = 196.59

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.