Home / 135,939.20-203,908.80-102,761.60

Finding the Fourth Proportional to 135,939.20, 203,908.80 and 102,761.60

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Solution

The fourth proportional to 135,939.20, 203,908.80 and 102,761.60 is: 154,142.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,939.20 : 203,908.80 = 102,761.60 : x
  2. Step 2: Convert to fraction form
    135,939.20/203,908.80 = 102,761.60/x
  3. Step 3: Cross multiply
    135,939.20x = 203,908.80 × 102,761.60
  4. Step 4: Simplify right side
    135,939.20x = 20,953,994,542.08
  5. Step 5: Solve for x
    x = 20,953,994,542.08/135,939.20
  6. Step 6: Final answer
    x = 154,142.40

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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.