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Finding the Fourth Proportional to 184.53, 254.50 and 129.21

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Solution

The fourth proportional to 184.53, 254.50 and 129.21 is: 178.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    184.53 : 254.50 = 129.21 : x
  2. Step 2: Convert to fraction form
    184.53/254.50 = 129.21/x
  3. Step 3: Cross multiply
    184.53x = 254.50 × 129.21
  4. Step 4: Simplify right side
    184.53x = 32,883.95
  5. Step 5: Solve for x
    x = 32,883.95/184.53
  6. Step 6: Final answer
    x = 178.20

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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.