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Finding the Fourth Proportional to 138,425.80, 207,201.30 and 108,682.60

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Solution

The fourth proportional to 138,425.80, 207,201.30 and 108,682.60 is: 162,680.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,425.80 : 207,201.30 = 108,682.60 : x
  2. Step 2: Convert to fraction form
    138,425.80/207,201.30 = 108,682.60/x
  3. Step 3: Cross multiply
    138,425.80x = 207,201.30 × 108,682.60
  4. Step 4: Simplify right side
    138,425.80x = 22,519,176,007.38
  5. Step 5: Solve for x
    x = 22,519,176,007.38/138,425.80
  6. Step 6: Final answer
    x = 162,680.48

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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.