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Finding the Fourth Proportional to 98,618.50, 136,093.53 and 53,906.50

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Solution

The fourth proportional to 98,618.50, 136,093.53 and 53,906.50 is: 74,390.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,618.50 : 136,093.53 = 53,906.50 : x
  2. Step 2: Convert to fraction form
    98,618.50/136,093.53 = 53,906.50/x
  3. Step 3: Cross multiply
    98,618.50x = 136,093.53 × 53,906.50
  4. Step 4: Simplify right side
    98,618.50x = 7,336,325,874.95
  5. Step 5: Solve for x
    x = 7,336,325,874.95/98,618.50
  6. Step 6: Final answer
    x = 74,390.97

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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.