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Finding the Fourth Proportional to 126,016.80, 188,733.60 and 86,359.20

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Solution

The fourth proportional to 126,016.80, 188,733.60 and 86,359.20 is: 129,338.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,016.80 : 188,733.60 = 86,359.20 : x
  2. Step 2: Convert to fraction form
    126,016.80/188,733.60 = 86,359.20/x
  3. Step 3: Cross multiply
    126,016.80x = 188,733.60 × 86,359.20
  4. Step 4: Simplify right side
    126,016.80x = 16,298,882,709.12
  5. Step 5: Solve for x
    x = 16,298,882,709.12/126,016.80
  6. Step 6: Final answer
    x = 129,338.97

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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.