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Finding the Fourth Proportional to 138,879.74, 208,276.54 and 50,121.71

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Solution

The fourth proportional to 138,879.74, 208,276.54 and 50,121.71 is: 75,167.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,879.74 : 208,276.54 = 50,121.71 : x
  2. Step 2: Convert to fraction form
    138,879.74/208,276.54 = 50,121.71/x
  3. Step 3: Cross multiply
    138,879.74x = 208,276.54 × 50,121.71
  4. Step 4: Simplify right side
    138,879.74x = 10,439,175,045.69
  5. Step 5: Solve for x
    x = 10,439,175,045.69/138,879.74
  6. Step 6: Final answer
    x = 75,167.01

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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.