Home / 138,979.09-208,747.63-82,928.61

Finding the Fourth Proportional to 138,979.09, 208,747.63 and 82,928.61

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Solution

The fourth proportional to 138,979.09, 208,747.63 and 82,928.61 is: 124,559.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,979.09 : 208,747.63 = 82,928.61 : x
  2. Step 2: Convert to fraction form
    138,979.09/208,747.63 = 82,928.61/x
  3. Step 3: Cross multiply
    138,979.09x = 208,747.63 × 82,928.61
  4. Step 4: Simplify right side
    138,979.09x = 17,311,150,900.36
  5. Step 5: Solve for x
    x = 17,311,150,900.36/138,979.09
  6. Step 6: Final answer
    x = 124,559.39

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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.