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Finding the Fourth Proportional to 207,930.65, 311,915.61 and 58,170.96

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Solution

The fourth proportional to 207,930.65, 311,915.61 and 58,170.96 is: 87,261.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,930.65 : 311,915.61 = 58,170.96 : x
  2. Step 2: Convert to fraction form
    207,930.65/311,915.61 = 58,170.96/x
  3. Step 3: Cross multiply
    207,930.65x = 311,915.61 × 58,170.96
  4. Step 4: Simplify right side
    207,930.65x = 18,144,430,472.69
  5. Step 5: Solve for x
    x = 18,144,430,472.69/207,930.65
  6. Step 6: Final answer
    x = 87,261.94

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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.