Home / 138,319.20-190,882.92-81,730.44

Finding the Fourth Proportional to 138,319.20, 190,882.92 and 81,730.44

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Solution

The fourth proportional to 138,319.20, 190,882.92 and 81,730.44 is: 112,789.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,319.20 : 190,882.92 = 81,730.44 : x
  2. Step 2: Convert to fraction form
    138,319.20/190,882.92 = 81,730.44/x
  3. Step 3: Cross multiply
    138,319.20x = 190,882.92 × 81,730.44
  4. Step 4: Simplify right side
    138,319.20x = 15,600,945,040.08
  5. Step 5: Solve for x
    x = 15,600,945,040.08/138,319.20
  6. Step 6: Final answer
    x = 112,789.44

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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.