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Finding the Fourth Proportional to 66,201.44, 99,281.09 and 21,819.92

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Solution

The fourth proportional to 66,201.44, 99,281.09 and 21,819.92 is: 32,722.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,201.44 : 99,281.09 = 21,819.92 : x
  2. Step 2: Convert to fraction form
    66,201.44/99,281.09 = 21,819.92/x
  3. Step 3: Cross multiply
    66,201.44x = 99,281.09 × 21,819.92
  4. Step 4: Simplify right side
    66,201.44x = 2,166,304,999.46
  5. Step 5: Solve for x
    x = 2,166,304,999.46/66,201.44
  6. Step 6: Final answer
    x = 32,722.93

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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.