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Finding the Fourth Proportional to 128,081.96, 192,118.84 and 57,961.27

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Solution

The fourth proportional to 128,081.96, 192,118.84 and 57,961.27 is: 86,940.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,081.96 : 192,118.84 = 57,961.27 : x
  2. Step 2: Convert to fraction form
    128,081.96/192,118.84 = 57,961.27/x
  3. Step 3: Cross multiply
    128,081.96x = 192,118.84 × 57,961.27
  4. Step 4: Simplify right side
    128,081.96x = 11,135,452,052.57
  5. Step 5: Solve for x
    x = 11,135,452,052.57/128,081.96
  6. Step 6: Final answer
    x = 86,940.05

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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.