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Finding the Fourth Proportional to 121.24, 180.65 and 119.08

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Solution

The fourth proportional to 121.24, 180.65 and 119.08 is: 177.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    121.24 : 180.65 = 119.08 : x
  2. Step 2: Convert to fraction form
    121.24/180.65 = 119.08/x
  3. Step 3: Cross multiply
    121.24x = 180.65 × 119.08
  4. Step 4: Simplify right side
    121.24x = 21,511.80
  5. Step 5: Solve for x
    x = 21,511.80/121.24
  6. Step 6: Final answer
    x = 177.43

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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.