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Finding the Fourth Proportional to 128,914.50, 193,447.02 and 54,028.44

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Solution

The fourth proportional to 128,914.50, 193,447.02 and 54,028.44 is: 81,074.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,914.50 : 193,447.02 = 54,028.44 : x
  2. Step 2: Convert to fraction form
    128,914.50/193,447.02 = 54,028.44/x
  3. Step 3: Cross multiply
    128,914.50x = 193,447.02 × 54,028.44
  4. Step 4: Simplify right side
    128,914.50x = 10,451,640,713.25
  5. Step 5: Solve for x
    x = 10,451,640,713.25/128,914.50
  6. Step 6: Final answer
    x = 81,074.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.