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Finding the Fourth Proportional to 74,579.60, 111,930.60 and 73,996.40

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Solution

The fourth proportional to 74,579.60, 111,930.60 and 73,996.40 is: 111,055.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,579.60 : 111,930.60 = 73,996.40 : x
  2. Step 2: Convert to fraction form
    74,579.60/111,930.60 = 73,996.40/x
  3. Step 3: Cross multiply
    74,579.60x = 111,930.60 × 73,996.40
  4. Step 4: Simplify right side
    74,579.60x = 8,282,461,449.84
  5. Step 5: Solve for x
    x = 8,282,461,449.84/74,579.60
  6. Step 6: Final answer
    x = 111,055.32

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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.