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Finding the Fourth Proportional to 66,651.62, 99,993.22 and 19,905.71

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Solution

The fourth proportional to 66,651.62, 99,993.22 and 19,905.71 is: 29,863.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,651.62 : 99,993.22 = 19,905.71 : x
  2. Step 2: Convert to fraction form
    66,651.62/99,993.22 = 19,905.71/x
  3. Step 3: Cross multiply
    66,651.62x = 99,993.22 × 19,905.71
  4. Step 4: Simplify right side
    66,651.62x = 1,990,435,489.56
  5. Step 5: Solve for x
    x = 1,990,435,489.56/66,651.62
  6. Step 6: Final answer
    x = 29,863.27

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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.