Home / 82,786.20-124,325.10-80,161.80

Finding the Fourth Proportional to 82,786.20, 124,325.10 and 80,161.80

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Solution

The fourth proportional to 82,786.20, 124,325.10 and 80,161.80 is: 120,383.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,786.20 : 124,325.10 = 80,161.80 : x
  2. Step 2: Convert to fraction form
    82,786.20/124,325.10 = 80,161.80/x
  3. Step 3: Cross multiply
    82,786.20x = 124,325.10 × 80,161.80
  4. Step 4: Simplify right side
    82,786.20x = 9,966,123,801.18
  5. Step 5: Solve for x
    x = 9,966,123,801.18/82,786.20
  6. Step 6: Final answer
    x = 120,383.88

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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.