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Finding the Fourth Proportional to 84,400.66, 126,690.21 and 82,494.72

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Solution

The fourth proportional to 84,400.66, 126,690.21 and 82,494.72 is: 123,829.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,400.66 : 126,690.21 = 82,494.72 : x
  2. Step 2: Convert to fraction form
    84,400.66/126,690.21 = 82,494.72/x
  3. Step 3: Cross multiply
    84,400.66x = 126,690.21 × 82,494.72
  4. Step 4: Simplify right side
    84,400.66x = 10,451,273,400.69
  5. Step 5: Solve for x
    x = 10,451,273,400.69/84,400.66
  6. Step 6: Final answer
    x = 123,829.29

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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.