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Finding the Fourth Proportional to 81,011.97, 111,801.90 and 45,202.78

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Solution

The fourth proportional to 81,011.97, 111,801.90 and 45,202.78 is: 62,382.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,011.97 : 111,801.90 = 45,202.78 : x
  2. Step 2: Convert to fraction form
    81,011.97/111,801.90 = 45,202.78/x
  3. Step 3: Cross multiply
    81,011.97x = 111,801.90 × 45,202.78
  4. Step 4: Simplify right side
    81,011.97x = 5,053,756,689.28
  5. Step 5: Solve for x
    x = 5,053,756,689.28/81,011.97
  6. Step 6: Final answer
    x = 62,382.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.