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Finding the Fourth Proportional to 154.69, 213.43 and 96.43

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Solution

The fourth proportional to 154.69, 213.43 and 96.43 is: 133.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.69 : 213.43 = 96.43 : x
  2. Step 2: Convert to fraction form
    154.69/213.43 = 96.43/x
  3. Step 3: Cross multiply
    154.69x = 213.43 × 96.43
  4. Step 4: Simplify right side
    154.69x = 20,581.05
  5. Step 5: Solve for x
    x = 20,581.05/154.69
  6. Step 6: Final answer
    x = 133.05

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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.