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Finding the Fourth Proportional to 74,694.70, 112,075 and 39,625.76

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Solution

The fourth proportional to 74,694.70, 112,075 and 39,625.76 is: 59,456.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,694.70 : 112,075 = 39,625.76 : x
  2. Step 2: Convert to fraction form
    74,694.70/112,075 = 39,625.76/x
  3. Step 3: Cross multiply
    74,694.70x = 112,075 × 39,625.76
  4. Step 4: Simplify right side
    74,694.70x = 4,441,057,052
  5. Step 5: Solve for x
    x = 4,441,057,052/74,694.70
  6. Step 6: Final answer
    x = 59,456.12

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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.