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Finding the Fourth Proportional to 170,874.96, 235,809 and 99,258

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Solution

The fourth proportional to 170,874.96, 235,809 and 99,258 is: 136,976.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,874.96 : 235,809 = 99,258 : x
  2. Step 2: Convert to fraction form
    170,874.96/235,809 = 99,258/x
  3. Step 3: Cross multiply
    170,874.96x = 235,809 × 99,258
  4. Step 4: Simplify right side
    170,874.96x = 23,405,929,722
  5. Step 5: Solve for x
    x = 23,405,929,722/170,874.96
  6. Step 6: Final answer
    x = 136,976.94

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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.