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Finding the Fourth Proportional to 138,717.88, 208,089.11 and 38,879.27

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Solution

The fourth proportional to 138,717.88, 208,089.11 and 38,879.27 is: 58,322.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,717.88 : 208,089.11 = 38,879.27 : x
  2. Step 2: Convert to fraction form
    138,717.88/208,089.11 = 38,879.27/x
  3. Step 3: Cross multiply
    138,717.88x = 208,089.11 × 38,879.27
  4. Step 4: Simplify right side
    138,717.88x = 8,090,352,497.35
  5. Step 5: Solve for x
    x = 8,090,352,497.35/138,717.88
  6. Step 6: Final answer
    x = 58,322.35

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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.