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Finding the Fourth Proportional to 206,614.80, 309,403.80 and 136,112.40

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Solution

The fourth proportional to 206,614.80, 309,403.80 and 136,112.40 is: 203,827.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,614.80 : 309,403.80 = 136,112.40 : x
  2. Step 2: Convert to fraction form
    206,614.80/309,403.80 = 136,112.40/x
  3. Step 3: Cross multiply
    206,614.80x = 309,403.80 × 136,112.40
  4. Step 4: Simplify right side
    206,614.80x = 42,113,693,787.12
  5. Step 5: Solve for x
    x = 42,113,693,787.12/206,614.80
  6. Step 6: Final answer
    x = 203,827.09

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1.5x scale

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.