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Finding the Fourth Proportional to 66,890.26, 100,310.28 and 21,901.24

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Solution

The fourth proportional to 66,890.26, 100,310.28 and 21,901.24 is: 32,843.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,890.26 : 100,310.28 = 21,901.24 : x
  2. Step 2: Convert to fraction form
    66,890.26/100,310.28 = 21,901.24/x
  3. Step 3: Cross multiply
    66,890.26x = 100,310.28 × 21,901.24
  4. Step 4: Simplify right side
    66,890.26x = 2,196,919,516.75
  5. Step 5: Solve for x
    x = 2,196,919,516.75/66,890.26
  6. Step 6: Final answer
    x = 32,843.64

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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.