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Finding the Fourth Proportional to 139,644.03, 209,498.85 and 39,805.66

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Solution

The fourth proportional to 139,644.03, 209,498.85 and 39,805.66 is: 59,717.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,644.03 : 209,498.85 = 39,805.66 : x
  2. Step 2: Convert to fraction form
    139,644.03/209,498.85 = 39,805.66/x
  3. Step 3: Cross multiply
    139,644.03x = 209,498.85 × 39,805.66
  4. Step 4: Simplify right side
    139,644.03x = 8,339,238,746.97
  5. Step 5: Solve for x
    x = 8,339,238,746.97/139,644.03
  6. Step 6: Final answer
    x = 59,717.83

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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.