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Finding the Fourth Proportional to 426,121.48, 639,161.46 and 159,861.25

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Solution

The fourth proportional to 426,121.48, 639,161.46 and 159,861.25 is: 239,784.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,121.48 : 639,161.46 = 159,861.25 : x
  2. Step 2: Convert to fraction form
    426,121.48/639,161.46 = 159,861.25/x
  3. Step 3: Cross multiply
    426,121.48x = 639,161.46 × 159,861.25
  4. Step 4: Simplify right side
    426,121.48x = 102,177,149,947.43
  5. Step 5: Solve for x
    x = 102,177,149,947.43/426,121.48
  6. Step 6: Final answer
    x = 239,784.09

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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.