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Finding the Fourth Proportional to 67,161.30, 100,745.55 and 20,410.62

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Solution

The fourth proportional to 67,161.30, 100,745.55 and 20,410.62 is: 30,617.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,161.30 : 100,745.55 = 20,410.62 : x
  2. Step 2: Convert to fraction form
    67,161.30/100,745.55 = 20,410.62/x
  3. Step 3: Cross multiply
    67,161.30x = 100,745.55 × 20,410.62
  4. Step 4: Simplify right side
    67,161.30x = 2,056,279,137.74
  5. Step 5: Solve for x
    x = 2,056,279,137.74/67,161.30
  6. Step 6: Final answer
    x = 30,617.02

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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.