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Finding the Fourth Proportional to 207,620.20, 311,235.90 and 162,616.60

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Solution

The fourth proportional to 207,620.20, 311,235.90 and 162,616.60 is: 243,772.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,620.20 : 311,235.90 = 162,616.60 : x
  2. Step 2: Convert to fraction form
    207,620.20/311,235.90 = 162,616.60/x
  3. Step 3: Cross multiply
    207,620.20x = 311,235.90 × 162,616.60
  4. Step 4: Simplify right side
    207,620.20x = 50,612,123,855.94
  5. Step 5: Solve for x
    x = 50,612,123,855.94/207,620.20
  6. Step 6: Final answer
    x = 243,772.64

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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.