Home / 138,646.77-191,334.41-78,217.23

Finding the Fourth Proportional to 138,646.77, 191,334.41 and 78,217.23

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Solution

The fourth proportional to 138,646.77, 191,334.41 and 78,217.23 is: 107,940.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,646.77 : 191,334.41 = 78,217.23 : x
  2. Step 2: Convert to fraction form
    138,646.77/191,334.41 = 78,217.23/x
  3. Step 3: Cross multiply
    138,646.77x = 191,334.41 × 78,217.23
  4. Step 4: Simplify right side
    138,646.77x = 14,965,647,162.80
  5. Step 5: Solve for x
    x = 14,965,647,162.80/138,646.77
  6. Step 6: Final answer
    x = 107,940.83

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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.