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Finding the Fourth Proportional to 85,682.96, 128,523.12 and 23,353.28

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Solution

The fourth proportional to 85,682.96, 128,523.12 and 23,353.28 is: 35,029.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,682.96 : 128,523.12 = 23,353.28 : x
  2. Step 2: Convert to fraction form
    85,682.96/128,523.12 = 23,353.28/x
  3. Step 3: Cross multiply
    85,682.96x = 128,523.12 × 23,353.28
  4. Step 4: Simplify right side
    85,682.96x = 3,001,436,407.83
  5. Step 5: Solve for x
    x = 3,001,436,407.83/85,682.96
  6. Step 6: Final answer
    x = 35,029.56

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1.5x scale

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.