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Finding the Fourth Proportional to 228,940.63, 315,940.40 and 126,968.11

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Solution

The fourth proportional to 228,940.63, 315,940.40 and 126,968.11 is: 175,217.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,940.63 : 315,940.40 = 126,968.11 : x
  2. Step 2: Convert to fraction form
    228,940.63/315,940.40 = 126,968.11/x
  3. Step 3: Cross multiply
    228,940.63x = 315,940.40 × 126,968.11
  4. Step 4: Simplify right side
    228,940.63x = 40,114,354,512.08
  5. Step 5: Solve for x
    x = 40,114,354,512.08/228,940.63
  6. Step 6: Final answer
    x = 175,217.28

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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.