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Finding the Fourth Proportional to 100,694.66, 138,959.10 and 55,375.52

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Solution

The fourth proportional to 100,694.66, 138,959.10 and 55,375.52 is: 76,418.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,694.66 : 138,959.10 = 55,375.52 : x
  2. Step 2: Convert to fraction form
    100,694.66/138,959.10 = 55,375.52/x
  3. Step 3: Cross multiply
    100,694.66x = 138,959.10 × 55,375.52
  4. Step 4: Simplify right side
    100,694.66x = 7,694,932,421.23
  5. Step 5: Solve for x
    x = 7,694,932,421.23/100,694.66
  6. Step 6: Final answer
    x = 76,418.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.