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Finding the Fourth Proportional to 136.84, 204.28 and 127.74

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Solution

The fourth proportional to 136.84, 204.28 and 127.74 is: 190.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.84 : 204.28 = 127.74 : x
  2. Step 2: Convert to fraction form
    136.84/204.28 = 127.74/x
  3. Step 3: Cross multiply
    136.84x = 204.28 × 127.74
  4. Step 4: Simplify right side
    136.84x = 26,094.73
  5. Step 5: Solve for x
    x = 26,094.73/136.84
  6. Step 6: Final answer
    x = 190.70

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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.