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Finding the Fourth Proportional to 243.06, 364.56 and 80.74

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Solution

The fourth proportional to 243.06, 364.56 and 80.74 is: 121.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.06 : 364.56 = 80.74 : x
  2. Step 2: Convert to fraction form
    243.06/364.56 = 80.74/x
  3. Step 3: Cross multiply
    243.06x = 364.56 × 80.74
  4. Step 4: Simplify right side
    243.06x = 29,434.57
  5. Step 5: Solve for x
    x = 29,434.57/243.06
  6. Step 6: Final answer
    x = 121.10

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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.