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Finding the Fourth Proportional to 127.24, 191.61 and 112.20

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Solution

The fourth proportional to 127.24, 191.61 and 112.20 is: 168.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.24 : 191.61 = 112.20 : x
  2. Step 2: Convert to fraction form
    127.24/191.61 = 112.20/x
  3. Step 3: Cross multiply
    127.24x = 191.61 × 112.20
  4. Step 4: Simplify right side
    127.24x = 21,498.64
  5. Step 5: Solve for x
    x = 21,498.64/127.24
  6. Step 6: Final answer
    x = 168.96

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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.