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Finding the Fourth Proportional to 87,422.40, 131,230.80 and 48,056.40

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Solution

The fourth proportional to 87,422.40, 131,230.80 and 48,056.40 is: 72,138.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,422.40 : 131,230.80 = 48,056.40 : x
  2. Step 2: Convert to fraction form
    87,422.40/131,230.80 = 48,056.40/x
  3. Step 3: Cross multiply
    87,422.40x = 131,230.80 × 48,056.40
  4. Step 4: Simplify right side
    87,422.40x = 6,306,479,817.12
  5. Step 5: Solve for x
    x = 6,306,479,817.12/87,422.40
  6. Step 6: Final answer
    x = 72,138.03

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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.