Home / 120,961.20-181,355.40-54,346.80

Finding the Fourth Proportional to 120,961.20, 181,355.40 and 54,346.80

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Solution

The fourth proportional to 120,961.20, 181,355.40 and 54,346.80 is: 81,481.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,961.20 : 181,355.40 = 54,346.80 : x
  2. Step 2: Convert to fraction form
    120,961.20/181,355.40 = 54,346.80/x
  3. Step 3: Cross multiply
    120,961.20x = 181,355.40 × 54,346.80
  4. Step 4: Simplify right side
    120,961.20x = 9,856,085,652.72
  5. Step 5: Solve for x
    x = 9,856,085,652.72/120,961.20
  6. Step 6: Final answer
    x = 81,481.38

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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.