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Finding the Fourth Proportional to 74,912.80, 112,498.80 and 48,733.60

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Solution

The fourth proportional to 74,912.80, 112,498.80 and 48,733.60 is: 73,184.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,912.80 : 112,498.80 = 48,733.60 : x
  2. Step 2: Convert to fraction form
    74,912.80/112,498.80 = 48,733.60/x
  3. Step 3: Cross multiply
    74,912.80x = 112,498.80 × 48,733.60
  4. Step 4: Simplify right side
    74,912.80x = 5,482,471,519.68
  5. Step 5: Solve for x
    x = 5,482,471,519.68/74,912.80
  6. Step 6: Final answer
    x = 73,184.71

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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.