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Finding the Fourth Proportional to 73,618.80, 110,428.20 and 40,441.20

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Solution

The fourth proportional to 73,618.80, 110,428.20 and 40,441.20 is: 60,661.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,618.80 : 110,428.20 = 40,441.20 : x
  2. Step 2: Convert to fraction form
    73,618.80/110,428.20 = 40,441.20/x
  3. Step 3: Cross multiply
    73,618.80x = 110,428.20 × 40,441.20
  4. Step 4: Simplify right side
    73,618.80x = 4,465,848,921.84
  5. Step 5: Solve for x
    x = 4,465,848,921.84/73,618.80
  6. Step 6: Final answer
    x = 60,661.80

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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.