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Finding the Fourth Proportional to 138,396.03, 206,835.66 and 101,034.78

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Solution

The fourth proportional to 138,396.03, 206,835.66 and 101,034.78 is: 150,998.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,396.03 : 206,835.66 = 101,034.78 : x
  2. Step 2: Convert to fraction form
    138,396.03/206,835.66 = 101,034.78/x
  3. Step 3: Cross multiply
    138,396.03x = 206,835.66 × 101,034.78
  4. Step 4: Simplify right side
    138,396.03x = 20,897,594,628.62
  5. Step 5: Solve for x
    x = 20,897,594,628.62/138,396.03
  6. Step 6: Final answer
    x = 150,998.52

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.