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Finding the Fourth Proportional to 89,016.80, 133,525.20 and 85,906.40

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Solution

The fourth proportional to 89,016.80, 133,525.20 and 85,906.40 is: 128,859.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,016.80 : 133,525.20 = 85,906.40 : x
  2. Step 2: Convert to fraction form
    89,016.80/133,525.20 = 85,906.40/x
  3. Step 3: Cross multiply
    89,016.80x = 133,525.20 × 85,906.40
  4. Step 4: Simplify right side
    89,016.80x = 11,470,669,241.28
  5. Step 5: Solve for x
    x = 11,470,669,241.28/89,016.80
  6. Step 6: Final answer
    x = 128,859.60

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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.