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Finding the Fourth Proportional to 70,956.92, 106,455.94 and 21,037.97

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Solution

The fourth proportional to 70,956.92, 106,455.94 and 21,037.97 is: 31,563.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,956.92 : 106,455.94 = 21,037.97 : x
  2. Step 2: Convert to fraction form
    70,956.92/106,455.94 = 21,037.97/x
  3. Step 3: Cross multiply
    70,956.92x = 106,455.94 × 21,037.97
  4. Step 4: Simplify right side
    70,956.92x = 2,239,617,085.59
  5. Step 5: Solve for x
    x = 2,239,617,085.59/70,956.92
  6. Step 6: Final answer
    x = 31,563.05

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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.