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Finding the Fourth Proportional to 200,420.70, 300,801.15 and 82,176.90

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Solution

The fourth proportional to 200,420.70, 300,801.15 and 82,176.90 is: 123,335.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,420.70 : 300,801.15 = 82,176.90 : x
  2. Step 2: Convert to fraction form
    200,420.70/300,801.15 = 82,176.90/x
  3. Step 3: Cross multiply
    200,420.70x = 300,801.15 × 82,176.90
  4. Step 4: Simplify right side
    200,420.70x = 24,718,906,023.44
  5. Step 5: Solve for x
    x = 24,718,906,023.44/200,420.70
  6. Step 6: Final answer
    x = 123,335.09

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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.