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Finding the Fourth Proportional to 66,469.34, 99,723.31 and 21,489.74

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Solution

The fourth proportional to 66,469.34, 99,723.31 and 21,489.74 is: 32,240.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,469.34 : 99,723.31 = 21,489.74 : x
  2. Step 2: Convert to fraction form
    66,469.34/99,723.31 = 21,489.74/x
  3. Step 3: Cross multiply
    66,469.34x = 99,723.31 × 21,489.74
  4. Step 4: Simplify right side
    66,469.34x = 2,143,027,451.50
  5. Step 5: Solve for x
    x = 2,143,027,451.50/66,469.34
  6. Step 6: Final answer
    x = 32,240.84

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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.