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Finding the Fourth Proportional to 206,274.88, 284,644.56 and 121,380.40

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Solution

The fourth proportional to 206,274.88, 284,644.56 and 121,380.40 is: 167,496.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,274.88 : 284,644.56 = 121,380.40 : x
  2. Step 2: Convert to fraction form
    206,274.88/284,644.56 = 121,380.40/x
  3. Step 3: Cross multiply
    206,274.88x = 284,644.56 × 121,380.40
  4. Step 4: Simplify right side
    206,274.88x = 34,550,270,550.62
  5. Step 5: Solve for x
    x = 34,550,270,550.62/206,274.88
  6. Step 6: Final answer
    x = 167,496.26

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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.