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Finding the Fourth Proportional to 199,207.20, 298,980.90 and 80,963.40

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Solution

The fourth proportional to 199,207.20, 298,980.90 and 80,963.40 is: 121,514.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,207.20 : 298,980.90 = 80,963.40 : x
  2. Step 2: Convert to fraction form
    199,207.20/298,980.90 = 80,963.40/x
  3. Step 3: Cross multiply
    199,207.20x = 298,980.90 × 80,963.40
  4. Step 4: Simplify right side
    199,207.20x = 24,206,510,199.06
  5. Step 5: Solve for x
    x = 24,206,510,199.06/199,207.20
  6. Step 6: Final answer
    x = 121,514.23

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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.