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Finding the Fourth Proportional to 99,391.93, 149,009.49 and 49,444.76

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Solution

The fourth proportional to 99,391.93, 149,009.49 and 49,444.76 is: 74,128.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,391.93 : 149,009.49 = 49,444.76 : x
  2. Step 2: Convert to fraction form
    99,391.93/149,009.49 = 49,444.76/x
  3. Step 3: Cross multiply
    99,391.93x = 149,009.49 × 49,444.76
  4. Step 4: Simplify right side
    99,391.93x = 7,367,738,843.30
  5. Step 5: Solve for x
    x = 7,367,738,843.30/99,391.93
  6. Step 6: Final answer
    x = 74,128.14

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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.