Home / 81,744.12-122,621.38-21,771.59

Finding the Fourth Proportional to 81,744.12, 122,621.38 and 21,771.59

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Solution

The fourth proportional to 81,744.12, 122,621.38 and 21,771.59 is: 32,658.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,744.12 : 122,621.38 = 21,771.59 : x
  2. Step 2: Convert to fraction form
    81,744.12/122,621.38 = 21,771.59/x
  3. Step 3: Cross multiply
    81,744.12x = 122,621.38 × 21,771.59
  4. Step 4: Simplify right side
    81,744.12x = 2,669,661,743.06
  5. Step 5: Solve for x
    x = 2,669,661,743.06/81,744.12
  6. Step 6: Final answer
    x = 32,658.76

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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.