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Finding the Fourth Proportional to 180.41, 248.71 and 121.29

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Solution

The fourth proportional to 180.41, 248.71 and 121.29 is: 167.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.41 : 248.71 = 121.29 : x
  2. Step 2: Convert to fraction form
    180.41/248.71 = 121.29/x
  3. Step 3: Cross multiply
    180.41x = 248.71 × 121.29
  4. Step 4: Simplify right side
    180.41x = 30,166.04
  5. Step 5: Solve for x
    x = 30,166.04/180.41
  6. Step 6: Final answer
    x = 167.21

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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.