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Finding the Fourth Proportional to 228,912.28, 315,893.12 and 126,936.11

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Solution

The fourth proportional to 228,912.28, 315,893.12 and 126,936.11 is: 175,168.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,912.28 : 315,893.12 = 126,936.11 : x
  2. Step 2: Convert to fraction form
    228,912.28/315,893.12 = 126,936.11/x
  3. Step 3: Cross multiply
    228,912.28x = 315,893.12 × 126,936.11
  4. Step 4: Simplify right side
    228,912.28x = 40,098,243,983.62
  5. Step 5: Solve for x
    x = 40,098,243,983.62/228,912.28
  6. Step 6: Final answer
    x = 175,168.60

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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.