Home / 138,788.40-208,057.44-49,979.28

Finding the Fourth Proportional to 138,788.40, 208,057.44 and 49,979.28

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Solution

The fourth proportional to 138,788.40, 208,057.44 and 49,979.28 is: 74,923.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,788.40 : 208,057.44 = 49,979.28 : x
  2. Step 2: Convert to fraction form
    138,788.40/208,057.44 = 49,979.28/x
  3. Step 3: Cross multiply
    138,788.40x = 208,057.44 × 49,979.28
  4. Step 4: Simplify right side
    138,788.40x = 10,398,561,049.84
  5. Step 5: Solve for x
    x = 10,398,561,049.84/138,788.40
  6. Step 6: Final answer
    x = 74,923.85

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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.