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Finding the Fourth Proportional to 126, 189 and 34.69

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Solution

The fourth proportional to 126, 189 and 34.69 is: 52.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    126 : 189 = 34.69 : x
  2. Step 2: Convert to fraction form
    126/189 = 34.69/x
  3. Step 3: Cross multiply
    126x = 189 × 34.69
  4. Step 4: Simplify right side
    126x = 6,555.94
  5. Step 5: Solve for x
    x = 6,555.94/126
  6. Step 6: Final answer
    x = 52.03

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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.