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Finding the Fourth Proportional to 66,212.85, 99,322.34 and 21,843.48

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Solution

The fourth proportional to 66,212.85, 99,322.34 and 21,843.48 is: 32,766.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,212.85 : 99,322.34 = 21,843.48 : x
  2. Step 2: Convert to fraction form
    66,212.85/99,322.34 = 21,843.48/x
  3. Step 3: Cross multiply
    66,212.85x = 99,322.34 × 21,843.48
  4. Step 4: Simplify right side
    66,212.85x = 2,169,545,438.13
  5. Step 5: Solve for x
    x = 2,169,545,438.13/66,212.85
  6. Step 6: Final answer
    x = 32,766.23

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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.