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Finding the Fourth Proportional to 91,907.60, 137,865.92 and 25,346.25

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Solution

The fourth proportional to 91,907.60, 137,865.92 and 25,346.25 is: 38,020.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,907.60 : 137,865.92 = 25,346.25 : x
  2. Step 2: Convert to fraction form
    91,907.60/137,865.92 = 25,346.25/x
  3. Step 3: Cross multiply
    91,907.60x = 137,865.92 × 25,346.25
  4. Step 4: Simplify right side
    91,907.60x = 3,494,383,948.07
  5. Step 5: Solve for x
    x = 3,494,383,948.07/91,907.60
  6. Step 6: Final answer
    x = 38,020.62

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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.