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Finding the Fourth Proportional to 204,861.80, 307,487.10 and 126,129.80

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Solution

The fourth proportional to 204,861.80, 307,487.10 and 126,129.80 is: 189,314.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,861.80 : 307,487.10 = 126,129.80 : x
  2. Step 2: Convert to fraction form
    204,861.80/307,487.10 = 126,129.80/x
  3. Step 3: Cross multiply
    204,861.80x = 307,487.10 × 126,129.80
  4. Step 4: Simplify right side
    204,861.80x = 38,783,286,425.58
  5. Step 5: Solve for x
    x = 38,783,286,425.58/204,861.80
  6. Step 6: Final answer
    x = 189,314.39

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1.5x scale

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.