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Finding the Fourth Proportional to 126.62, 189.67 and 92.45

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Solution

The fourth proportional to 126.62, 189.67 and 92.45 is: 138.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.62 : 189.67 = 92.45 : x
  2. Step 2: Convert to fraction form
    126.62/189.67 = 92.45/x
  3. Step 3: Cross multiply
    126.62x = 189.67 × 92.45
  4. Step 4: Simplify right side
    126.62x = 17,534.53
  5. Step 5: Solve for x
    x = 17,534.53/126.62
  6. Step 6: Final answer
    x = 138.49

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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.