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Finding the Fourth Proportional to 85,891.48, 128,808.06 and 33,286.84

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Solution

The fourth proportional to 85,891.48, 128,808.06 and 33,286.84 is: 49,918.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,891.48 : 128,808.06 = 33,286.84 : x
  2. Step 2: Convert to fraction form
    85,891.48/128,808.06 = 33,286.84/x
  3. Step 3: Cross multiply
    85,891.48x = 128,808.06 × 33,286.84
  4. Step 4: Simplify right side
    85,891.48x = 4,287,613,283.93
  5. Step 5: Solve for x
    x = 4,287,613,283.93/85,891.48
  6. Step 6: Final answer
    x = 49,918.96

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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.