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Finding the Fourth Proportional to 138,661.27, 207,991.91 and 38,836.26

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Solution

The fourth proportional to 138,661.27, 207,991.91 and 38,836.26 is: 58,254.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,661.27 : 207,991.91 = 38,836.26 : x
  2. Step 2: Convert to fraction form
    138,661.27/207,991.91 = 38,836.26/x
  3. Step 3: Cross multiply
    138,661.27x = 207,991.91 × 38,836.26
  4. Step 4: Simplify right side
    138,661.27x = 8,077,627,894.66
  5. Step 5: Solve for x
    x = 8,077,627,894.66/138,661.27
  6. Step 6: Final answer
    x = 58,254.39

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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.