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Finding the Fourth Proportional to 70,881.63, 106,343.21 and 20,963.03

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Solution

The fourth proportional to 70,881.63, 106,343.21 and 20,963.03 is: 31,450.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,881.63 : 106,343.21 = 20,963.03 : x
  2. Step 2: Convert to fraction form
    70,881.63/106,343.21 = 20,963.03/x
  3. Step 3: Cross multiply
    70,881.63x = 106,343.21 × 20,963.03
  4. Step 4: Simplify right side
    70,881.63x = 2,229,275,265.00
  5. Step 5: Solve for x
    x = 2,229,275,265.00/70,881.63
  6. Step 6: Final answer
    x = 31,450.68

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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.