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Finding the Fourth Proportional to 100,418.56, 138,589.44 and 55,709.44

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Solution

The fourth proportional to 100,418.56, 138,589.44 and 55,709.44 is: 76,885.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,418.56 : 138,589.44 = 55,709.44 : x
  2. Step 2: Convert to fraction form
    100,418.56/138,589.44 = 55,709.44/x
  3. Step 3: Cross multiply
    100,418.56x = 138,589.44 × 55,709.44
  4. Step 4: Simplify right side
    100,418.56x = 7,720,740,092.31
  5. Step 5: Solve for x
    x = 7,720,740,092.31/100,418.56
  6. Step 6: Final answer
    x = 76,885.59

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.