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Finding the Fourth Proportional to 81,940.77, 122,870.01 and 39,794.43

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Solution

The fourth proportional to 81,940.77, 122,870.01 and 39,794.43 is: 59,671.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,940.77 : 122,870.01 = 39,794.43 : x
  2. Step 2: Convert to fraction form
    81,940.77/122,870.01 = 39,794.43/x
  3. Step 3: Cross multiply
    81,940.77x = 122,870.01 × 39,794.43
  4. Step 4: Simplify right side
    81,940.77x = 4,889,542,012.04
  5. Step 5: Solve for x
    x = 4,889,542,012.04/81,940.77
  6. Step 6: Final answer
    x = 59,671.66

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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.