Home / 127,899.20-192,021.60-81,243.20

Finding the Fourth Proportional to 127,899.20, 192,021.60 and 81,243.20

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Solution

The fourth proportional to 127,899.20, 192,021.60 and 81,243.20 is: 121,974.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,899.20 : 192,021.60 = 81,243.20 : x
  2. Step 2: Convert to fraction form
    127,899.20/192,021.60 = 81,243.20/x
  3. Step 3: Cross multiply
    127,899.20x = 192,021.60 × 81,243.20
  4. Step 4: Simplify right side
    127,899.20x = 15,600,449,253.12
  5. Step 5: Solve for x
    x = 15,600,449,253.12/127,899.20
  6. Step 6: Final answer
    x = 121,974.56

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1.5x scale

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.