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Finding the Fourth Proportional to 66,112.44, 99,174.96 and 21,739.56

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Solution

The fourth proportional to 66,112.44, 99,174.96 and 21,739.56 is: 32,611.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,112.44 : 99,174.96 = 21,739.56 : x
  2. Step 2: Convert to fraction form
    66,112.44/99,174.96 = 21,739.56/x
  3. Step 3: Cross multiply
    66,112.44x = 99,174.96 × 21,739.56
  4. Step 4: Simplify right side
    66,112.44x = 2,156,019,993.42
  5. Step 5: Solve for x
    x = 2,156,019,993.42/66,112.44
  6. Step 6: Final answer
    x = 32,611.41

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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.