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Finding the Fourth Proportional to 228,910.89, 315,900.86 and 126,940.65

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Solution

The fourth proportional to 228,910.89, 315,900.86 and 126,940.65 is: 175,180.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,910.89 : 315,900.86 = 126,940.65 : x
  2. Step 2: Convert to fraction form
    228,910.89/315,900.86 = 126,940.65/x
  3. Step 3: Cross multiply
    228,910.89x = 315,900.86 × 126,940.65
  4. Step 4: Simplify right side
    228,910.89x = 40,100,660,503.96
  5. Step 5: Solve for x
    x = 40,100,660,503.96/228,910.89
  6. Step 6: Final answer
    x = 175,180.22

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1.5x scale

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.