Home / 205,261.25-307,766.09-72,156.78

Finding the Fourth Proportional to 205,261.25, 307,766.09 and 72,156.78

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Solution

The fourth proportional to 205,261.25, 307,766.09 and 72,156.78 is: 108,190.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,261.25 : 307,766.09 = 72,156.78 : x
  2. Step 2: Convert to fraction form
    205,261.25/307,766.09 = 72,156.78/x
  3. Step 3: Cross multiply
    205,261.25x = 307,766.09 × 72,156.78
  4. Step 4: Simplify right side
    205,261.25x = 22,207,410,227.98
  5. Step 5: Solve for x
    x = 22,207,410,227.98/205,261.25
  6. Step 6: Final answer
    x = 108,190.96

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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.