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Finding the Fourth Proportional to 137.21, 188.30 and 126.27

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Solution

The fourth proportional to 137.21, 188.30 and 126.27 is: 173.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    137.21 : 188.30 = 126.27 : x
  2. Step 2: Convert to fraction form
    137.21/188.30 = 126.27/x
  3. Step 3: Cross multiply
    137.21x = 188.30 × 126.27
  4. Step 4: Simplify right side
    137.21x = 23,776.96
  5. Step 5: Solve for x
    x = 23,776.96/137.21
  6. Step 6: Final answer
    x = 173.30

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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.