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Finding the Fourth Proportional to 184.12, 254.17 and 121.98

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Solution

The fourth proportional to 184.12, 254.17 and 121.98 is: 168.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    184.12 : 254.17 = 121.98 : x
  2. Step 2: Convert to fraction form
    184.12/254.17 = 121.98/x
  3. Step 3: Cross multiply
    184.12x = 254.17 × 121.98
  4. Step 4: Simplify right side
    184.12x = 31,003.05
  5. Step 5: Solve for x
    x = 31,003.05/184.12
  6. Step 6: Final answer
    x = 168.39

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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.