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Finding the Fourth Proportional to 85,993.14, 128,912.76 and 33,390.12

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Solution

The fourth proportional to 85,993.14, 128,912.76 and 33,390.12 is: 50,055.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,993.14 : 128,912.76 = 33,390.12 : x
  2. Step 2: Convert to fraction form
    85,993.14/128,912.76 = 33,390.12/x
  3. Step 3: Cross multiply
    85,993.14x = 128,912.76 × 33,390.12
  4. Step 4: Simplify right side
    85,993.14x = 4,304,412,525.93
  5. Step 5: Solve for x
    x = 4,304,412,525.93/85,993.14
  6. Step 6: Final answer
    x = 50,055.30

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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.