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Finding the Fourth Proportional to 99,481.19, 137,280.69 and 54,158.31

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Solution

The fourth proportional to 99,481.19, 137,280.69 and 54,158.31 is: 74,736.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,481.19 : 137,280.69 = 54,158.31 : x
  2. Step 2: Convert to fraction form
    99,481.19/137,280.69 = 54,158.31/x
  3. Step 3: Cross multiply
    99,481.19x = 137,280.69 × 54,158.31
  4. Step 4: Simplify right side
    99,481.19x = 7,434,890,166.03
  5. Step 5: Solve for x
    x = 7,434,890,166.03/99,481.19
  6. Step 6: Final answer
    x = 74,736.65

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.