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Finding the Fourth Proportional to 138,190.63, 207,180.60 and 43,366.12

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Solution

The fourth proportional to 138,190.63, 207,180.60 and 43,366.12 is: 65,016.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,190.63 : 207,180.60 = 43,366.12 : x
  2. Step 2: Convert to fraction form
    138,190.63/207,180.60 = 43,366.12/x
  3. Step 3: Cross multiply
    138,190.63x = 207,180.60 × 43,366.12
  4. Step 4: Simplify right side
    138,190.63x = 8,984,618,761.27
  5. Step 5: Solve for x
    x = 8,984,618,761.27/138,190.63
  6. Step 6: Final answer
    x = 65,016.12

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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.