Home / 131,078.33-196,165.72-80,443.75

Finding the Fourth Proportional to 131,078.33, 196,165.72 and 80,443.75

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Solution

The fourth proportional to 131,078.33, 196,165.72 and 80,443.75 is: 120,388.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,078.33 : 196,165.72 = 80,443.75 : x
  2. Step 2: Convert to fraction form
    131,078.33/196,165.72 = 80,443.75/x
  3. Step 3: Cross multiply
    131,078.33x = 196,165.72 × 80,443.75
  4. Step 4: Simplify right side
    131,078.33x = 15,780,306,342.45
  5. Step 5: Solve for x
    x = 15,780,306,342.45/131,078.33
  6. Step 6: Final answer
    x = 120,388.36

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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.