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Finding the Fourth Proportional to 100,618.22, 138,843.54 and 60,324.50

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Solution

The fourth proportional to 100,618.22, 138,843.54 and 60,324.50 is: 83,242.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,618.22 : 138,843.54 = 60,324.50 : x
  2. Step 2: Convert to fraction form
    100,618.22/138,843.54 = 60,324.50/x
  3. Step 3: Cross multiply
    100,618.22x = 138,843.54 × 60,324.50
  4. Step 4: Simplify right side
    100,618.22x = 8,375,667,128.73
  5. Step 5: Solve for x
    x = 8,375,667,128.73/100,618.22
  6. Step 6: Final answer
    x = 83,242.05

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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.