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Finding the Fourth Proportional to 66,059.69, 99,086.09 and 21,680.60

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Solution

The fourth proportional to 66,059.69, 99,086.09 and 21,680.60 is: 32,519.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,059.69 : 99,086.09 = 21,680.60 : x
  2. Step 2: Convert to fraction form
    66,059.69/99,086.09 = 21,680.60/x
  3. Step 3: Cross multiply
    66,059.69x = 99,086.09 × 21,680.60
  4. Step 4: Simplify right side
    66,059.69x = 2,148,245,279.02
  5. Step 5: Solve for x
    x = 2,148,245,279.02/66,059.69
  6. Step 6: Final answer
    x = 32,519.76

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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.