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Finding the Fourth Proportional to 48,405.80, 72,608.70 and 36,117.80

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Solution

The fourth proportional to 48,405.80, 72,608.70 and 36,117.80 is: 54,176.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,405.80 : 72,608.70 = 36,117.80 : x
  2. Step 2: Convert to fraction form
    48,405.80/72,608.70 = 36,117.80/x
  3. Step 3: Cross multiply
    48,405.80x = 72,608.70 × 36,117.80
  4. Step 4: Simplify right side
    48,405.80x = 2,622,466,504.86
  5. Step 5: Solve for x
    x = 2,622,466,504.86/48,405.80
  6. Step 6: Final answer
    x = 54,176.70

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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.