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Finding the Fourth Proportional to 81,771.44, 112,855.02 and 49,933.64

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Solution

The fourth proportional to 81,771.44, 112,855.02 and 49,933.64 is: 68,914.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,771.44 : 112,855.02 = 49,933.64 : x
  2. Step 2: Convert to fraction form
    81,771.44/112,855.02 = 49,933.64/x
  3. Step 3: Cross multiply
    81,771.44x = 112,855.02 × 49,933.64
  4. Step 4: Simplify right side
    81,771.44x = 5,635,261,940.87
  5. Step 5: Solve for x
    x = 5,635,261,940.87/81,771.44
  6. Step 6: Final answer
    x = 68,914.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.