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Finding the Fourth Proportional to 138,435.76, 207,477.06 and 67,375.27

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Solution

The fourth proportional to 138,435.76, 207,477.06 and 67,375.27 is: 100,976.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,435.76 : 207,477.06 = 67,375.27 : x
  2. Step 2: Convert to fraction form
    138,435.76/207,477.06 = 67,375.27/x
  3. Step 3: Cross multiply
    138,435.76x = 207,477.06 × 67,375.27
  4. Step 4: Simplify right side
    138,435.76x = 13,978,822,936.31
  5. Step 5: Solve for x
    x = 13,978,822,936.31/138,435.76
  6. Step 6: Final answer
    x = 100,976.97

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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.