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Finding the Fourth Proportional to 138,625.05, 207,792.86 and 100,582.41

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Solution

The fourth proportional to 138,625.05, 207,792.86 and 100,582.41 is: 150,768.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,625.05 : 207,792.86 = 100,582.41 : x
  2. Step 2: Convert to fraction form
    138,625.05/207,792.86 = 100,582.41/x
  3. Step 3: Cross multiply
    138,625.05x = 207,792.86 × 100,582.41
  4. Step 4: Simplify right side
    138,625.05x = 20,900,306,136.68
  5. Step 5: Solve for x
    x = 20,900,306,136.68/138,625.05
  6. Step 6: Final answer
    x = 150,768.61

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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.