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Finding the Fourth Proportional to 127.25, 189.46 and 126.68

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Solution

The fourth proportional to 127.25, 189.46 and 126.68 is: 188.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.25 : 189.46 = 126.68 : x
  2. Step 2: Convert to fraction form
    127.25/189.46 = 126.68/x
  3. Step 3: Cross multiply
    127.25x = 189.46 × 126.68
  4. Step 4: Simplify right side
    127.25x = 24,000.00
  5. Step 5: Solve for x
    x = 24,000.00/127.25
  6. Step 6: Final answer
    x = 188.61

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.