Home / 81,729.36-122,593.86-21,757.85

Finding the Fourth Proportional to 81,729.36, 122,593.86 and 21,757.85

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Solution

The fourth proportional to 81,729.36, 122,593.86 and 21,757.85 is: 32,636.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,729.36 : 122,593.86 = 21,757.85 : x
  2. Step 2: Convert to fraction form
    81,729.36/122,593.86 = 21,757.85/x
  3. Step 3: Cross multiply
    81,729.36x = 122,593.86 × 21,757.85
  4. Step 4: Simplify right side
    81,729.36x = 2,667,378,401.53
  5. Step 5: Solve for x
    x = 2,667,378,401.53/81,729.36
  6. Step 6: Final answer
    x = 32,636.72

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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.