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Finding the Fourth Proportional to 121.71, 183.22 and 104.97

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Solution

The fourth proportional to 121.71, 183.22 and 104.97 is: 158.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    121.71 : 183.22 = 104.97 : x
  2. Step 2: Convert to fraction form
    121.71/183.22 = 104.97/x
  3. Step 3: Cross multiply
    121.71x = 183.22 × 104.97
  4. Step 4: Simplify right side
    121.71x = 19,231.16
  5. Step 5: Solve for x
    x = 19,231.16/121.71
  6. Step 6: Final answer
    x = 158.01

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.