Home / 80,997.69-121,382.36-38,257.56

Finding the Fourth Proportional to 80,997.69, 121,382.36 and 38,257.56

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Solution

The fourth proportional to 80,997.69, 121,382.36 and 38,257.56 is: 57,332.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,997.69 : 121,382.36 = 38,257.56 : x
  2. Step 2: Convert to fraction form
    80,997.69/121,382.36 = 38,257.56/x
  3. Step 3: Cross multiply
    80,997.69x = 121,382.36 × 38,257.56
  4. Step 4: Simplify right side
    80,997.69x = 4,643,792,920.64
  5. Step 5: Solve for x
    x = 4,643,792,920.64/80,997.69
  6. Step 6: Final answer
    x = 57,332.41

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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.