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Finding the Fourth Proportional to 85,694.58, 128,568.12 and 38,349.51

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Solution

The fourth proportional to 85,694.58, 128,568.12 and 38,349.51 is: 57,536.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,694.58 : 128,568.12 = 38,349.51 : x
  2. Step 2: Convert to fraction form
    85,694.58/128,568.12 = 38,349.51/x
  3. Step 3: Cross multiply
    85,694.58x = 128,568.12 × 38,349.51
  4. Step 4: Simplify right side
    85,694.58x = 4,930,524,403.62
  5. Step 5: Solve for x
    x = 4,930,524,403.62/85,694.58
  6. Step 6: Final answer
    x = 57,536.01

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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.