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Finding the Fourth Proportional to 66,800.86, 100,212.84 and 22,431.90

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Solution

The fourth proportional to 66,800.86, 100,212.84 and 22,431.90 is: 33,651.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,800.86 : 100,212.84 = 22,431.90 : x
  2. Step 2: Convert to fraction form
    66,800.86/100,212.84 = 22,431.90/x
  3. Step 3: Cross multiply
    66,800.86x = 100,212.84 × 22,431.90
  4. Step 4: Simplify right side
    66,800.86x = 2,247,964,405.60
  5. Step 5: Solve for x
    x = 2,247,964,405.60/66,800.86
  6. Step 6: Final answer
    x = 33,651.73

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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.