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Finding the Fourth Proportional to 65,561.72, 98,340.05 and 18,814.60

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Solution

The fourth proportional to 65,561.72, 98,340.05 and 18,814.60 is: 28,221.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,561.72 : 98,340.05 = 18,814.60 : x
  2. Step 2: Convert to fraction form
    65,561.72/98,340.05 = 18,814.60/x
  3. Step 3: Cross multiply
    65,561.72x = 98,340.05 × 18,814.60
  4. Step 4: Simplify right side
    65,561.72x = 1,850,228,118.96
  5. Step 5: Solve for x
    x = 1,850,228,118.96/65,561.72
  6. Step 6: Final answer
    x = 28,221.17

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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.