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Finding the Fourth Proportional to 228,834.11, 315,793.69 and 126,861.90

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Solution

The fourth proportional to 228,834.11, 315,793.69 and 126,861.90 is: 175,070.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,834.11 : 315,793.69 = 126,861.90 : x
  2. Step 2: Convert to fraction form
    228,834.11/315,793.69 = 126,861.90/x
  3. Step 3: Cross multiply
    228,834.11x = 315,793.69 × 126,861.90
  4. Step 4: Simplify right side
    228,834.11x = 40,062,186,020.03
  5. Step 5: Solve for x
    x = 40,062,186,020.03/228,834.11
  6. Step 6: Final answer
    x = 175,070.87

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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.