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Finding the Fourth Proportional to 127.24, 191.88 and 126.43

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Solution

The fourth proportional to 127.24, 191.88 and 126.43 is: 190.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.24 : 191.88 = 126.43 : x
  2. Step 2: Convert to fraction form
    127.24/191.88 = 126.43/x
  3. Step 3: Cross multiply
    127.24x = 191.88 × 126.43
  4. Step 4: Simplify right side
    127.24x = 24,258.91
  5. Step 5: Solve for x
    x = 24,258.91/127.24
  6. Step 6: Final answer
    x = 190.66

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.