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Finding the Fourth Proportional to 138,620.23, 207,937.90 and 43,843.33

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Solution

The fourth proportional to 138,620.23, 207,937.90 and 43,843.33 is: 65,767.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,620.23 : 207,937.90 = 43,843.33 : x
  2. Step 2: Convert to fraction form
    138,620.23/207,937.90 = 43,843.33/x
  3. Step 3: Cross multiply
    138,620.23x = 207,937.90 × 43,843.33
  4. Step 4: Simplify right side
    138,620.23x = 9,116,689,969.21
  5. Step 5: Solve for x
    x = 9,116,689,969.21/138,620.23
  6. Step 6: Final answer
    x = 65,767.38

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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.