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Finding the Fourth Proportional to 81,005.88, 111,787.96 and 45,193.76

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Solution

The fourth proportional to 81,005.88, 111,787.96 and 45,193.76 is: 62,367.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,005.88 : 111,787.96 = 45,193.76 : x
  2. Step 2: Convert to fraction form
    81,005.88/111,787.96 = 45,193.76/x
  3. Step 3: Cross multiply
    81,005.88x = 111,787.96 × 45,193.76
  4. Step 4: Simplify right side
    81,005.88x = 5,052,118,235.13
  5. Step 5: Solve for x
    x = 5,052,118,235.13/81,005.88
  6. Step 6: Final answer
    x = 62,367.30

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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.