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Finding the Fourth Proportional to 98,486.08, 135,923.72 and 55,474.01

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Solution

The fourth proportional to 98,486.08, 135,923.72 and 55,474.01 is: 76,561.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,486.08 : 135,923.72 = 55,474.01 : x
  2. Step 2: Convert to fraction form
    98,486.08/135,923.72 = 55,474.01/x
  3. Step 3: Cross multiply
    98,486.08x = 135,923.72 × 55,474.01
  4. Step 4: Simplify right side
    98,486.08x = 7,540,234,431.85
  5. Step 5: Solve for x
    x = 7,540,234,431.85/98,486.08
  6. Step 6: Final answer
    x = 76,561.42

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Why These Related Problems?

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