Home / 154.20-231.26-131.16

Finding the Fourth Proportional to 154.20, 231.26 and 131.16

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Solution

The fourth proportional to 154.20, 231.26 and 131.16 is: 196.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.20 : 231.26 = 131.16 : x
  2. Step 2: Convert to fraction form
    154.20/231.26 = 131.16/x
  3. Step 3: Cross multiply
    154.20x = 231.26 × 131.16
  4. Step 4: Simplify right side
    154.20x = 30,332.06
  5. Step 5: Solve for x
    x = 30,332.06/154.20
  6. Step 6: Final answer
    x = 196.71

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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.