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Finding the Fourth Proportional to 206,360.20, 309,540.30 and 135,501.40

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Solution

The fourth proportional to 206,360.20, 309,540.30 and 135,501.40 is: 203,252.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,360.20 : 309,540.30 = 135,501.40 : x
  2. Step 2: Convert to fraction form
    206,360.20/309,540.30 = 135,501.40/x
  3. Step 3: Cross multiply
    206,360.20x = 309,540.30 × 135,501.40
  4. Step 4: Simplify right side
    206,360.20x = 41,943,144,006.42
  5. Step 5: Solve for x
    x = 41,943,144,006.42/206,360.20
  6. Step 6: Final answer
    x = 203,252.10

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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.