Home / 135,356.62-186,811.23-78,786.22

Finding the Fourth Proportional to 135,356.62, 186,811.23 and 78,786.22

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Solution

The fourth proportional to 135,356.62, 186,811.23 and 78,786.22 is: 108,736.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,356.62 : 186,811.23 = 78,786.22 : x
  2. Step 2: Convert to fraction form
    135,356.62/186,811.23 = 78,786.22/x
  3. Step 3: Cross multiply
    135,356.62x = 186,811.23 × 78,786.22
  4. Step 4: Simplify right side
    135,356.62x = 14,718,150,665.25
  5. Step 5: Solve for x
    x = 14,718,150,665.25/135,356.62
  6. Step 6: Final answer
    x = 108,736.10

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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.