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Finding the Fourth Proportional to 85,497.93, 128,249.10 and 40,508.73

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Solution

The fourth proportional to 85,497.93, 128,249.10 and 40,508.73 is: 60,764.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,497.93 : 128,249.10 = 40,508.73 : x
  2. Step 2: Convert to fraction form
    85,497.93/128,249.10 = 40,508.73/x
  3. Step 3: Cross multiply
    85,497.93x = 128,249.10 × 40,508.73
  4. Step 4: Simplify right side
    85,497.93x = 5,195,208,164.64
  5. Step 5: Solve for x
    x = 5,195,208,164.64/85,497.93
  6. Step 6: Final answer
    x = 60,764.14

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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.