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Finding the Fourth Proportional to 135,986.80, 203,785.80 and 100,168.60

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Solution

The fourth proportional to 135,986.80, 203,785.80 and 100,168.60 is: 150,109.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,986.80 : 203,785.80 = 100,168.60 : x
  2. Step 2: Convert to fraction form
    135,986.80/203,785.80 = 100,168.60/x
  3. Step 3: Cross multiply
    135,986.80x = 203,785.80 × 100,168.60
  4. Step 4: Simplify right side
    135,986.80x = 20,412,938,285.88
  5. Step 5: Solve for x
    x = 20,412,938,285.88/135,986.80
  6. Step 6: Final answer
    x = 150,109.70

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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.