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Finding the Fourth Proportional to 74,188.66, 111,355.90 and 54,410.90

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Solution

The fourth proportional to 74,188.66, 111,355.90 and 54,410.90 is: 81,669.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,188.66 : 111,355.90 = 54,410.90 : x
  2. Step 2: Convert to fraction form
    74,188.66/111,355.90 = 54,410.90/x
  3. Step 3: Cross multiply
    74,188.66x = 111,355.90 × 54,410.90
  4. Step 4: Simplify right side
    74,188.66x = 6,058,974,739.31
  5. Step 5: Solve for x
    x = 6,058,974,739.31/74,188.66
  6. Step 6: Final answer
    x = 81,669.82

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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.