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Finding the Fourth Proportional to 177.18, 244.62 and 121.91

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Solution

The fourth proportional to 177.18, 244.62 and 121.91 is: 168.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    177.18 : 244.62 = 121.91 : x
  2. Step 2: Convert to fraction form
    177.18/244.62 = 121.91/x
  3. Step 3: Cross multiply
    177.18x = 244.62 × 121.91
  4. Step 4: Simplify right side
    177.18x = 29,820.40
  5. Step 5: Solve for x
    x = 29,820.40/177.18
  6. Step 6: Final answer
    x = 168.31

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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.