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Finding the Fourth Proportional to 138,608.76, 207,911.31 and 33,426.88

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Solution

The fourth proportional to 138,608.76, 207,911.31 and 33,426.88 is: 50,139.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,608.76 : 207,911.31 = 33,426.88 : x
  2. Step 2: Convert to fraction form
    138,608.76/207,911.31 = 33,426.88/x
  3. Step 3: Cross multiply
    138,608.76x = 207,911.31 × 33,426.88
  4. Step 4: Simplify right side
    138,608.76x = 6,949,826,410.01
  5. Step 5: Solve for x
    x = 6,949,826,410.01/138,608.76
  6. Step 6: Final answer
    x = 50,139.88

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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.