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Finding the Fourth Proportional to 204.59, 282.35 and 121.70

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Solution

The fourth proportional to 204.59, 282.35 and 121.70 is: 167.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.59 : 282.35 = 121.70 : x
  2. Step 2: Convert to fraction form
    204.59/282.35 = 121.70/x
  3. Step 3: Cross multiply
    204.59x = 282.35 × 121.70
  4. Step 4: Simplify right side
    204.59x = 34,359.97
  5. Step 5: Solve for x
    x = 34,359.97/204.59
  6. Step 6: Final answer
    x = 167.95

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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.