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Finding the Fourth Proportional to 81,099, 111,966.03 and 55,647.18

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Solution

The fourth proportional to 81,099, 111,966.03 and 55,647.18 is: 76,827.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,099 : 111,966.03 = 55,647.18 : x
  2. Step 2: Convert to fraction form
    81,099/111,966.03 = 55,647.18/x
  3. Step 3: Cross multiply
    81,099x = 111,966.03 × 55,647.18
  4. Step 4: Simplify right side
    81,099x = 6,230,593,825.30
  5. Step 5: Solve for x
    x = 6,230,593,825.30/81,099
  6. Step 6: Final answer
    x = 76,827.01

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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.