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Finding the Fourth Proportional to 67,165.72, 100,744.94 and 20,414.95

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Solution

The fourth proportional to 67,165.72, 100,744.94 and 20,414.95 is: 30,621.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,165.72 : 100,744.94 = 20,414.95 : x
  2. Step 2: Convert to fraction form
    67,165.72/100,744.94 = 20,414.95/x
  3. Step 3: Cross multiply
    67,165.72x = 100,744.94 × 20,414.95
  4. Step 4: Simplify right side
    67,165.72x = 2,056,702,912.85
  5. Step 5: Solve for x
    x = 2,056,702,912.85/67,165.72
  6. Step 6: Final answer
    x = 30,621.32

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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.