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Finding the Fourth Proportional to 67,167.80, 100,757.34 and 20,421.08

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Solution

The fourth proportional to 67,167.80, 100,757.34 and 20,421.08 is: 30,633.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,167.80 : 100,757.34 = 20,421.08 : x
  2. Step 2: Convert to fraction form
    67,167.80/100,757.34 = 20,421.08/x
  3. Step 3: Cross multiply
    67,167.80x = 100,757.34 × 20,421.08
  4. Step 4: Simplify right side
    67,167.80x = 2,057,573,700.73
  5. Step 5: Solve for x
    x = 2,057,573,700.73/67,167.80
  6. Step 6: Final answer
    x = 30,633.33

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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.