Home / 128,961.45-193,512.78-50,078.79

Finding the Fourth Proportional to 128,961.45, 193,512.78 and 50,078.79

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Solution

The fourth proportional to 128,961.45, 193,512.78 and 50,078.79 is: 75,145.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,961.45 : 193,512.78 = 50,078.79 : x
  2. Step 2: Convert to fraction form
    128,961.45/193,512.78 = 50,078.79/x
  3. Step 3: Cross multiply
    128,961.45x = 193,512.78 × 50,078.79
  4. Step 4: Simplify right side
    128,961.45x = 9,690,885,871.94
  5. Step 5: Solve for x
    x = 9,690,885,871.94/128,961.45
  6. Step 6: Final answer
    x = 75,145.60

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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.