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Finding the Fourth Proportional to 73,720.75, 110,581.89 and 18,316.75

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Solution

The fourth proportional to 73,720.75, 110,581.89 and 18,316.75 is: 27,475.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,720.75 : 110,581.89 = 18,316.75 : x
  2. Step 2: Convert to fraction form
    73,720.75/110,581.89 = 18,316.75/x
  3. Step 3: Cross multiply
    73,720.75x = 110,581.89 × 18,316.75
  4. Step 4: Simplify right side
    73,720.75x = 2,025,500,833.66
  5. Step 5: Solve for x
    x = 2,025,500,833.66/73,720.75
  6. Step 6: Final answer
    x = 27,475.32

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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.