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Finding the Fourth Proportional to 138,040.38, 207,054.55 and 43,268.40

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Solution

The fourth proportional to 138,040.38, 207,054.55 and 43,268.40 is: 64,900.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,040.38 : 207,054.55 = 43,268.40 : x
  2. Step 2: Convert to fraction form
    138,040.38/207,054.55 = 43,268.40/x
  3. Step 3: Cross multiply
    138,040.38x = 207,054.55 × 43,268.40
  4. Step 4: Simplify right side
    138,040.38x = 8,958,918,901.92
  5. Step 5: Solve for x
    x = 8,958,918,901.92/138,040.38
  6. Step 6: Final answer
    x = 64,900.71

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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.