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Finding the Fourth Proportional to 206,905.50, 285,529.86 and 117,481.50

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Solution

The fourth proportional to 206,905.50, 285,529.86 and 117,481.50 is: 162,124.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,905.50 : 285,529.86 = 117,481.50 : x
  2. Step 2: Convert to fraction form
    206,905.50/285,529.86 = 117,481.50/x
  3. Step 3: Cross multiply
    206,905.50x = 285,529.86 × 117,481.50
  4. Step 4: Simplify right side
    206,905.50x = 33,544,476,247.59
  5. Step 5: Solve for x
    x = 33,544,476,247.59/206,905.50
  6. Step 6: Final answer
    x = 162,124.62

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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.