Home / 127,845.20-191,940.60-81,189.20

Finding the Fourth Proportional to 127,845.20, 191,940.60 and 81,189.20

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Solution

The fourth proportional to 127,845.20, 191,940.60 and 81,189.20 is: 121,893.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,845.20 : 191,940.60 = 81,189.20 : x
  2. Step 2: Convert to fraction form
    127,845.20/191,940.60 = 81,189.20/x
  3. Step 3: Cross multiply
    127,845.20x = 191,940.60 × 81,189.20
  4. Step 4: Simplify right side
    127,845.20x = 15,583,503,761.52
  5. Step 5: Solve for x
    x = 15,583,503,761.52/127,845.20
  6. Step 6: Final answer
    x = 121,893.54

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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.