Home / 135,578.97-187,105.86-78,196.95

Finding the Fourth Proportional to 135,578.97, 187,105.86 and 78,196.95

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Solution

The fourth proportional to 135,578.97, 187,105.86 and 78,196.95 is: 107,915.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,578.97 : 187,105.86 = 78,196.95 : x
  2. Step 2: Convert to fraction form
    135,578.97/187,105.86 = 78,196.95/x
  3. Step 3: Cross multiply
    135,578.97x = 187,105.86 × 78,196.95
  4. Step 4: Simplify right side
    135,578.97x = 14,631,107,579.13
  5. Step 5: Solve for x
    x = 14,631,107,579.13/135,578.97
  6. Step 6: Final answer
    x = 107,915.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.