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Finding the Fourth Proportional to 82,150.81, 113,265.40 and 68,558.40

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Solution

The fourth proportional to 82,150.81, 113,265.40 and 68,558.40 is: 94,524.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,150.81 : 113,265.40 = 68,558.40 : x
  2. Step 2: Convert to fraction form
    82,150.81/113,265.40 = 68,558.40/x
  3. Step 3: Cross multiply
    82,150.81x = 113,265.40 × 68,558.40
  4. Step 4: Simplify right side
    82,150.81x = 7,765,294,539.73
  5. Step 5: Solve for x
    x = 7,765,294,539.73/82,150.81
  6. Step 6: Final answer
    x = 94,524.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.