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Finding the Fourth Proportional to 215,910.98, 298,103.92 and 139,614.65

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Solution

The fourth proportional to 215,910.98, 298,103.92 and 139,614.65 is: 192,763.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,910.98 : 298,103.92 = 139,614.65 : x
  2. Step 2: Convert to fraction form
    215,910.98/298,103.92 = 139,614.65/x
  3. Step 3: Cross multiply
    215,910.98x = 298,103.92 × 139,614.65
  4. Step 4: Simplify right side
    215,910.98x = 41,619,672,614.87
  5. Step 5: Solve for x
    x = 41,619,672,614.87/215,910.98
  6. Step 6: Final answer
    x = 192,763.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.