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Finding the Fourth Proportional to 99,473.48, 149,211.78 and 55,380.48

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Solution

The fourth proportional to 99,473.48, 149,211.78 and 55,380.48 is: 83,071.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,473.48 : 149,211.78 = 55,380.48 : x
  2. Step 2: Convert to fraction form
    99,473.48/149,211.78 = 55,380.48/x
  3. Step 3: Cross multiply
    99,473.48x = 149,211.78 × 55,380.48
  4. Step 4: Simplify right side
    99,473.48x = 8,263,419,998.05
  5. Step 5: Solve for x
    x = 8,263,419,998.05/99,473.48
  6. Step 6: Final answer
    x = 83,071.59

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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.