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Finding the Fourth Proportional to 128,081.86, 192,122.79 and 43,843.12

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Solution

The fourth proportional to 128,081.86, 192,122.79 and 43,843.12 is: 65,764.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,081.86 : 192,122.79 = 43,843.12 : x
  2. Step 2: Convert to fraction form
    128,081.86/192,122.79 = 43,843.12/x
  3. Step 3: Cross multiply
    128,081.86x = 192,122.79 × 43,843.12
  4. Step 4: Simplify right side
    128,081.86x = 8,423,262,536.70
  5. Step 5: Solve for x
    x = 8,423,262,536.70/128,081.86
  6. Step 6: Final answer
    x = 65,764.68

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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.