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Finding the Fourth Proportional to 69,072.91, 103,472.19 and 53,222.95

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Solution

The fourth proportional to 69,072.91, 103,472.19 and 53,222.95 is: 79,728.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,072.91 : 103,472.19 = 53,222.95 : x
  2. Step 2: Convert to fraction form
    69,072.91/103,472.19 = 53,222.95/x
  3. Step 3: Cross multiply
    69,072.91x = 103,472.19 × 53,222.95
  4. Step 4: Simplify right side
    69,072.91x = 5,507,095,194.76
  5. Step 5: Solve for x
    x = 5,507,095,194.76/69,072.91
  6. Step 6: Final answer
    x = 79,728.73

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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.