Home / 100,682.43-138,940.50-55,360.05

Finding the Fourth Proportional to 100,682.43, 138,940.50 and 55,360.05

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Solution

The fourth proportional to 100,682.43, 138,940.50 and 55,360.05 is: 76,396.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,682.43 : 138,940.50 = 55,360.05 : x
  2. Step 2: Convert to fraction form
    100,682.43/138,940.50 = 55,360.05/x
  3. Step 3: Cross multiply
    100,682.43x = 138,940.50 × 55,360.05
  4. Step 4: Simplify right side
    100,682.43x = 7,691,753,027.03
  5. Step 5: Solve for x
    x = 7,691,753,027.03/100,682.43
  6. Step 6: Final answer
    x = 76,396.18

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Why These Related Problems?

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