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Finding the Fourth Proportional to 67,163.77, 100,760.64 and 20,420.29

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Solution

The fourth proportional to 67,163.77, 100,760.64 and 20,420.29 is: 30,634.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,163.77 : 100,760.64 = 20,420.29 : x
  2. Step 2: Convert to fraction form
    67,163.77/100,760.64 = 20,420.29/x
  3. Step 3: Cross multiply
    67,163.77x = 100,760.64 × 20,420.29
  4. Step 4: Simplify right side
    67,163.77x = 2,057,561,489.39
  5. Step 5: Solve for x
    x = 2,057,561,489.39/67,163.77
  6. Step 6: Final answer
    x = 30,634.99

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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.