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Finding the Fourth Proportional to 127.48, 190.80 and 113.92

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Solution

The fourth proportional to 127.48, 190.80 and 113.92 is: 170.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.48 : 190.80 = 113.92 : x
  2. Step 2: Convert to fraction form
    127.48/190.80 = 113.92/x
  3. Step 3: Cross multiply
    127.48x = 190.80 × 113.92
  4. Step 4: Simplify right side
    127.48x = 21,735.94
  5. Step 5: Solve for x
    x = 21,735.94/127.48
  6. Step 6: Final answer
    x = 170.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.