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Finding the Fourth Proportional to 135,930.80, 203,701.80 and 100,112.60

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Solution

The fourth proportional to 135,930.80, 203,701.80 and 100,112.60 is: 150,025.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,930.80 : 203,701.80 = 100,112.60 : x
  2. Step 2: Convert to fraction form
    135,930.80/203,701.80 = 100,112.60/x
  3. Step 3: Cross multiply
    135,930.80x = 203,701.80 × 100,112.60
  4. Step 4: Simplify right side
    135,930.80x = 20,393,116,822.68
  5. Step 5: Solve for x
    x = 20,393,116,822.68/135,930.80
  6. Step 6: Final answer
    x = 150,025.73

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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.