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Finding the Third Proportional to 85,261.50 and 127,890

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Solution

The third proportional to 85,261.50 and 127,890 is: 191,831.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,261.50 : 127,890 = 127,890 : x
  2. Step 2: Convert to fraction form
    85,261.50/127,890 = 127,890/x
  3. Step 3: Cross multiply
    85,261.50x = 127,890 × 127,890
  4. Step 4: Simplify right side
    85,261.50x = 16,355,852,100
  5. Step 5: Solve for x
    x = 16,355,852,100/85,261.50
  6. Step 6: Final answer
    x = 191,831.63

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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.