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Finding the Fourth Proportional to 200,618.70, 300,672.90 and 82,156.20

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Solution

The fourth proportional to 200,618.70, 300,672.90 and 82,156.20 is: 123,129.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,618.70 : 300,672.90 = 82,156.20 : x
  2. Step 2: Convert to fraction form
    200,618.70/300,672.90 = 82,156.20/x
  3. Step 3: Cross multiply
    200,618.70x = 300,672.90 × 82,156.20
  4. Step 4: Simplify right side
    200,618.70x = 24,702,142,906.98
  5. Step 5: Solve for x
    x = 24,702,142,906.98/200,618.70
  6. Step 6: Final answer
    x = 123,129.81

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1.5x scale

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.