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Finding the Fourth Proportional to 135,901.80, 203,949.90 and 57,072.60

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Solution

The fourth proportional to 135,901.80, 203,949.90 and 57,072.60 is: 85,649.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,901.80 : 203,949.90 = 57,072.60 : x
  2. Step 2: Convert to fraction form
    135,901.80/203,949.90 = 57,072.60/x
  3. Step 3: Cross multiply
    135,901.80x = 203,949.90 × 57,072.60
  4. Step 4: Simplify right side
    135,901.80x = 11,639,951,062.74
  5. Step 5: Solve for x
    x = 11,639,951,062.74/135,901.80
  6. Step 6: Final answer
    x = 85,649.72

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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.