Home / 138,879.61-208,276.43-50,121.88

Finding the Fourth Proportional to 138,879.61, 208,276.43 and 50,121.88

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Solution

The fourth proportional to 138,879.61, 208,276.43 and 50,121.88 is: 75,167.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,879.61 : 208,276.43 = 50,121.88 : x
  2. Step 2: Convert to fraction form
    138,879.61/208,276.43 = 50,121.88/x
  3. Step 3: Cross multiply
    138,879.61x = 208,276.43 × 50,121.88
  4. Step 4: Simplify right side
    138,879.61x = 10,439,206,231.29
  5. Step 5: Solve for x
    x = 10,439,206,231.29/138,879.61
  6. Step 6: Final answer
    x = 75,167.31

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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.