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Finding the Fourth Proportional to 127.72, 175.98 and 107.97

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Solution

The fourth proportional to 127.72, 175.98 and 107.97 is: 148.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.72 : 175.98 = 107.97 : x
  2. Step 2: Convert to fraction form
    127.72/175.98 = 107.97/x
  3. Step 3: Cross multiply
    127.72x = 175.98 × 107.97
  4. Step 4: Simplify right side
    127.72x = 19,000.56
  5. Step 5: Solve for x
    x = 19,000.56/127.72
  6. Step 6: Final answer
    x = 148.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.