Home / 81,098.24-121,653.87-28,519.52

Finding the Fourth Proportional to 81,098.24, 121,653.87 and 28,519.52

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Solution

The fourth proportional to 81,098.24, 121,653.87 and 28,519.52 is: 42,781.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,098.24 : 121,653.87 = 28,519.52 : x
  2. Step 2: Convert to fraction form
    81,098.24/121,653.87 = 28,519.52/x
  3. Step 3: Cross multiply
    81,098.24x = 121,653.87 × 28,519.52
  4. Step 4: Simplify right side
    81,098.24x = 3,469,509,978.54
  5. Step 5: Solve for x
    x = 3,469,509,978.54/81,098.24
  6. Step 6: Final answer
    x = 42,781.57

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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.