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Finding the Fourth Proportional to 154.34, 231.42 and 73.17

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Solution

The fourth proportional to 154.34, 231.42 and 73.17 is: 109.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.34 : 231.42 = 73.17 : x
  2. Step 2: Convert to fraction form
    154.34/231.42 = 73.17/x
  3. Step 3: Cross multiply
    154.34x = 231.42 × 73.17
  4. Step 4: Simplify right side
    154.34x = 16,933.28
  5. Step 5: Solve for x
    x = 16,933.28/154.34
  6. Step 6: Final answer
    x = 109.71

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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.