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Finding the Fourth Proportional to 67,171.80, 100,763.34 and 20,425.08

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Solution

The fourth proportional to 67,171.80, 100,763.34 and 20,425.08 is: 30,639.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,171.80 : 100,763.34 = 20,425.08 : x
  2. Step 2: Convert to fraction form
    67,171.80/100,763.34 = 20,425.08/x
  3. Step 3: Cross multiply
    67,171.80x = 100,763.34 × 20,425.08
  4. Step 4: Simplify right side
    67,171.80x = 2,058,099,280.57
  5. Step 5: Solve for x
    x = 2,058,099,280.57/67,171.80
  6. Step 6: Final answer
    x = 30,639.33

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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.