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Finding the Fourth Proportional to 138,071.25, 207,109.40 and 43,299.32

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Solution

The fourth proportional to 138,071.25, 207,109.40 and 43,299.32 is: 64,949.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,071.25 : 207,109.40 = 43,299.32 : x
  2. Step 2: Convert to fraction form
    138,071.25/207,109.40 = 43,299.32/x
  3. Step 3: Cross multiply
    138,071.25x = 207,109.40 × 43,299.32
  4. Step 4: Simplify right side
    138,071.25x = 8,967,694,933.56
  5. Step 5: Solve for x
    x = 8,967,694,933.56/138,071.25
  6. Step 6: Final answer
    x = 64,949.76

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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.