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Finding the Fourth Proportional to 91,093.86, 125,724.90 and 67,289.58

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Solution

The fourth proportional to 91,093.86, 125,724.90 and 67,289.58 is: 92,870.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,093.86 : 125,724.90 = 67,289.58 : x
  2. Step 2: Convert to fraction form
    91,093.86/125,724.90 = 67,289.58/x
  3. Step 3: Cross multiply
    91,093.86x = 125,724.90 × 67,289.58
  4. Step 4: Simplify right side
    91,093.86x = 8,459,975,716.54
  5. Step 5: Solve for x
    x = 8,459,975,716.54/91,093.86
  6. Step 6: Final answer
    x = 92,870.98

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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.