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Finding the Fourth Proportional to 98,908.50, 136,493.73 and 54,195.54

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Solution

The fourth proportional to 98,908.50, 136,493.73 and 54,195.54 is: 74,789.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,908.50 : 136,493.73 = 54,195.54 : x
  2. Step 2: Convert to fraction form
    98,908.50/136,493.73 = 54,195.54/x
  3. Step 3: Cross multiply
    98,908.50x = 136,493.73 × 54,195.54
  4. Step 4: Simplify right side
    98,908.50x = 7,397,351,403.96
  5. Step 5: Solve for x
    x = 7,397,351,403.96/98,908.50
  6. Step 6: Final answer
    x = 74,789.85

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1.5x scale

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.