Home / 128,360.28-192,469.31-52,512.09

Finding the Fourth Proportional to 128,360.28, 192,469.31 and 52,512.09

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Solution

The fourth proportional to 128,360.28, 192,469.31 and 52,512.09 is: 78,739.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,360.28 : 192,469.31 = 52,512.09 : x
  2. Step 2: Convert to fraction form
    128,360.28/192,469.31 = 52,512.09/x
  3. Step 3: Cross multiply
    128,360.28x = 192,469.31 × 52,512.09
  4. Step 4: Simplify right side
    128,360.28x = 10,106,965,728.96
  5. Step 5: Solve for x
    x = 10,106,965,728.96/128,360.28
  6. Step 6: Final answer
    x = 78,739.04

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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.