Home / 80,786.43-121,015.62-40,780.73

Finding the Fourth Proportional to 80,786.43, 121,015.62 and 40,780.73

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Solution

The fourth proportional to 80,786.43, 121,015.62 and 40,780.73 is: 61,088.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,786.43 : 121,015.62 = 40,780.73 : x
  2. Step 2: Convert to fraction form
    80,786.43/121,015.62 = 40,780.73/x
  3. Step 3: Cross multiply
    80,786.43x = 121,015.62 × 40,780.73
  4. Step 4: Simplify right side
    80,786.43x = 4,935,105,627.54
  5. Step 5: Solve for x
    x = 4,935,105,627.54/80,786.43
  6. Step 6: Final answer
    x = 61,088.30

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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.