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Finding the Fourth Proportional to 126.11, 174.02 and 70.85

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Solution

The fourth proportional to 126.11, 174.02 and 70.85 is: 97.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.11 : 174.02 = 70.85 : x
  2. Step 2: Convert to fraction form
    126.11/174.02 = 70.85/x
  3. Step 3: Cross multiply
    126.11x = 174.02 × 70.85
  4. Step 4: Simplify right side
    126.11x = 12,328.96
  5. Step 5: Solve for x
    x = 12,328.96/126.11
  6. Step 6: Final answer
    x = 97.76

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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.