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Finding the Fourth Proportional to 65,891.88, 98,847.44 and 19,138.68

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Solution

The fourth proportional to 65,891.88, 98,847.44 and 19,138.68 is: 28,710.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,891.88 : 98,847.44 = 19,138.68 : x
  2. Step 2: Convert to fraction form
    65,891.88/98,847.44 = 19,138.68/x
  3. Step 3: Cross multiply
    65,891.88x = 98,847.44 × 19,138.68
  4. Step 4: Simplify right side
    65,891.88x = 1,891,809,522.98
  5. Step 5: Solve for x
    x = 1,891,809,522.98/65,891.88
  6. Step 6: Final answer
    x = 28,710.81

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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.