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Finding the Fourth Proportional to 279,212.52, 418,865.82 and 129,392.04

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Solution

The fourth proportional to 279,212.52, 418,865.82 and 129,392.04 is: 194,109.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,212.52 : 418,865.82 = 129,392.04 : x
  2. Step 2: Convert to fraction form
    279,212.52/418,865.82 = 129,392.04/x
  3. Step 3: Cross multiply
    279,212.52x = 418,865.82 × 129,392.04
  4. Step 4: Simplify right side
    279,212.52x = 54,197,902,936.07
  5. Step 5: Solve for x
    x = 54,197,902,936.07/279,212.52
  6. Step 6: Final answer
    x = 194,109.86

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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.