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Finding the Fourth Proportional to 66,937.01, 100,422.18 and 20,189.88

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Solution

The fourth proportional to 66,937.01, 100,422.18 and 20,189.88 is: 30,289.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,937.01 : 100,422.18 = 20,189.88 : x
  2. Step 2: Convert to fraction form
    66,937.01/100,422.18 = 20,189.88/x
  3. Step 3: Cross multiply
    66,937.01x = 100,422.18 × 20,189.88
  4. Step 4: Simplify right side
    66,937.01x = 2,027,511,763.54
  5. Step 5: Solve for x
    x = 2,027,511,763.54/66,937.01
  6. Step 6: Final answer
    x = 30,289.85

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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.