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Finding the Fourth Proportional to 134.18, 200.20 and 127.88

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Solution

The fourth proportional to 134.18, 200.20 and 127.88 is: 190.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.18 : 200.20 = 127.88 : x
  2. Step 2: Convert to fraction form
    134.18/200.20 = 127.88/x
  3. Step 3: Cross multiply
    134.18x = 200.20 × 127.88
  4. Step 4: Simplify right side
    134.18x = 25,601.58
  5. Step 5: Solve for x
    x = 25,601.58/134.18
  6. Step 6: Final answer
    x = 190.80

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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.