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Finding the Fourth Proportional to 204,640.62, 306,958.80 and 79,980.54

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Solution

The fourth proportional to 204,640.62, 306,958.80 and 79,980.54 is: 119,969.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,640.62 : 306,958.80 = 79,980.54 : x
  2. Step 2: Convert to fraction form
    204,640.62/306,958.80 = 79,980.54/x
  3. Step 3: Cross multiply
    204,640.62x = 306,958.80 × 79,980.54
  4. Step 4: Simplify right side
    204,640.62x = 24,550,730,581.75
  5. Step 5: Solve for x
    x = 24,550,730,581.75/204,640.62
  6. Step 6: Final answer
    x = 119,969.98

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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.