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Finding the Fourth Proportional to 126.87, 174.35 and 118.77

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Solution

The fourth proportional to 126.87, 174.35 and 118.77 is: 163.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.87 : 174.35 = 118.77 : x
  2. Step 2: Convert to fraction form
    126.87/174.35 = 118.77/x
  3. Step 3: Cross multiply
    126.87x = 174.35 × 118.77
  4. Step 4: Simplify right side
    126.87x = 20,707.55
  5. Step 5: Solve for x
    x = 20,707.55/126.87
  6. Step 6: Final answer
    x = 163.22

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.