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Finding the Fourth Proportional to 113,422.20, 170,206.20 and 66,037.20

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Solution

The fourth proportional to 113,422.20, 170,206.20 and 66,037.20 is: 99,098.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,422.20 : 170,206.20 = 66,037.20 : x
  2. Step 2: Convert to fraction form
    113,422.20/170,206.20 = 66,037.20/x
  3. Step 3: Cross multiply
    113,422.20x = 170,206.20 × 66,037.20
  4. Step 4: Simplify right side
    113,422.20x = 11,239,940,870.64
  5. Step 5: Solve for x
    x = 11,239,940,870.64/113,422.20
  6. Step 6: Final answer
    x = 99,098.24

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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.