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Finding the Fourth Proportional to 74,892.60, 112,371.57 and 39,791.16

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Solution

The fourth proportional to 74,892.60, 112,371.57 and 39,791.16 is: 59,704.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,892.60 : 112,371.57 = 39,791.16 : x
  2. Step 2: Convert to fraction form
    74,892.60/112,371.57 = 39,791.16/x
  3. Step 3: Cross multiply
    74,892.60x = 112,371.57 × 39,791.16
  4. Step 4: Simplify right side
    74,892.60x = 4,471,395,121.32
  5. Step 5: Solve for x
    x = 4,471,395,121.32/74,892.60
  6. Step 6: Final answer
    x = 59,704.10

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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.