Home / 81,789.68-122,731.84-34,400.96

Finding the Fourth Proportional to 81,789.68, 122,731.84 and 34,400.96

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Solution

The fourth proportional to 81,789.68, 122,731.84 and 34,400.96 is: 51,621.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,789.68 : 122,731.84 = 34,400.96 : x
  2. Step 2: Convert to fraction form
    81,789.68/122,731.84 = 34,400.96/x
  3. Step 3: Cross multiply
    81,789.68x = 122,731.84 × 34,400.96
  4. Step 4: Simplify right side
    81,789.68x = 4,222,093,118.57
  5. Step 5: Solve for x
    x = 4,222,093,118.57/81,789.68
  6. Step 6: Final answer
    x = 51,621.34

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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.