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Finding the Fourth Proportional to 177.19, 244.28 and 121.83

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Solution

The fourth proportional to 177.19, 244.28 and 121.83 is: 167.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    177.19 : 244.28 = 121.83 : x
  2. Step 2: Convert to fraction form
    177.19/244.28 = 121.83/x
  3. Step 3: Cross multiply
    177.19x = 244.28 × 121.83
  4. Step 4: Simplify right side
    177.19x = 29,759.41
  5. Step 5: Solve for x
    x = 29,759.41/177.19
  6. Step 6: Final answer
    x = 167.96

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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.