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Finding the Fourth Proportional to 66,493.56, 99,756.60 and 22,120.20

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Solution

The fourth proportional to 66,493.56, 99,756.60 and 22,120.20 is: 33,185.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,493.56 : 99,756.60 = 22,120.20 : x
  2. Step 2: Convert to fraction form
    66,493.56/99,756.60 = 22,120.20/x
  3. Step 3: Cross multiply
    66,493.56x = 99,756.60 × 22,120.20
  4. Step 4: Simplify right side
    66,493.56x = 2,206,635,943.32
  5. Step 5: Solve for x
    x = 2,206,635,943.32/66,493.56
  6. Step 6: Final answer
    x = 33,185.71

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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.