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Finding the Fourth Proportional to 70,712.67, 106,098.38 and 28,622.51

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Solution

The fourth proportional to 70,712.67, 106,098.38 and 28,622.51 is: 42,945.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,712.67 : 106,098.38 = 28,622.51 : x
  2. Step 2: Convert to fraction form
    70,712.67/106,098.38 = 28,622.51/x
  3. Step 3: Cross multiply
    70,712.67x = 106,098.38 × 28,622.51
  4. Step 4: Simplify right side
    70,712.67x = 3,036,801,340.49
  5. Step 5: Solve for x
    x = 3,036,801,340.49/70,712.67
  6. Step 6: Final answer
    x = 42,945.65

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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.