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Finding the Fourth Proportional to 91,705.95, 137,578.73 and 28,524.87

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Solution

The fourth proportional to 91,705.95, 137,578.73 and 28,524.87 is: 42,793.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,705.95 : 137,578.73 = 28,524.87 : x
  2. Step 2: Convert to fraction form
    91,705.95/137,578.73 = 28,524.87/x
  3. Step 3: Cross multiply
    91,705.95x = 137,578.73 × 28,524.87
  4. Step 4: Simplify right side
    91,705.95x = 3,924,415,245.39
  5. Step 5: Solve for x
    x = 3,924,415,245.39/91,705.95
  6. Step 6: Final answer
    x = 42,793.46

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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.