Home / 81,682.08-122,491.38-31,755.57

Finding the Fourth Proportional to 81,682.08, 122,491.38 and 31,755.57

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Solution

The fourth proportional to 81,682.08, 122,491.38 and 31,755.57 is: 47,621.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,682.08 : 122,491.38 = 31,755.57 : x
  2. Step 2: Convert to fraction form
    81,682.08/122,491.38 = 31,755.57/x
  3. Step 3: Cross multiply
    81,682.08x = 122,491.38 × 31,755.57
  4. Step 4: Simplify right side
    81,682.08x = 3,889,783,591.99
  5. Step 5: Solve for x
    x = 3,889,783,591.99/81,682.08
  6. Step 6: Final answer
    x = 47,621.02

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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.