Home / 81,180.94-121,716.33-28,583.50

Finding the Fourth Proportional to 81,180.94, 121,716.33 and 28,583.50

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Solution

The fourth proportional to 81,180.94, 121,716.33 and 28,583.50 is: 42,855.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,180.94 : 121,716.33 = 28,583.50 : x
  2. Step 2: Convert to fraction form
    81,180.94/121,716.33 = 28,583.50/x
  3. Step 3: Cross multiply
    81,180.94x = 121,716.33 × 28,583.50
  4. Step 4: Simplify right side
    81,180.94x = 3,479,078,718.56
  5. Step 5: Solve for x
    x = 3,479,078,718.56/81,180.94
  6. Step 6: Final answer
    x = 42,855.86

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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.