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Finding the Fourth Proportional to 199,279.72, 298,990.86 and 85,379.68

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Solution

The fourth proportional to 199,279.72, 298,990.86 and 85,379.68 is: 128,100.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,279.72 : 298,990.86 = 85,379.68 : x
  2. Step 2: Convert to fraction form
    199,279.72/298,990.86 = 85,379.68/x
  3. Step 3: Cross multiply
    199,279.72x = 298,990.86 × 85,379.68
  4. Step 4: Simplify right side
    199,279.72x = 25,527,743,949.72
  5. Step 5: Solve for x
    x = 25,527,743,949.72/199,279.72
  6. Step 6: Final answer
    x = 128,100.06

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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.