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Finding the Fourth Proportional to 71,156.03, 106,718.31 and 20,544.06

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Solution

The fourth proportional to 71,156.03, 106,718.31 and 20,544.06 is: 30,811.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,156.03 : 106,718.31 = 20,544.06 : x
  2. Step 2: Convert to fraction form
    71,156.03/106,718.31 = 20,544.06/x
  3. Step 3: Cross multiply
    71,156.03x = 106,718.31 × 20,544.06
  4. Step 4: Simplify right side
    71,156.03x = 2,192,426,963.54
  5. Step 5: Solve for x
    x = 2,192,426,963.54/71,156.03
  6. Step 6: Final answer
    x = 30,811.54

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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.