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Finding the Fourth Proportional to 138,610.35, 207,914.90 and 54,310.95

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Solution

The fourth proportional to 138,610.35, 207,914.90 and 54,310.95 is: 81,466.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,610.35 : 207,914.90 = 54,310.95 : x
  2. Step 2: Convert to fraction form
    138,610.35/207,914.90 = 54,310.95/x
  3. Step 3: Cross multiply
    138,610.35x = 207,914.90 × 54,310.95
  4. Step 4: Simplify right side
    138,610.35x = 11,292,055,466.60
  5. Step 5: Solve for x
    x = 11,292,055,466.60/138,610.35
  6. Step 6: Final answer
    x = 81,466.18

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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.