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Finding the Fourth Proportional to 43,335.84, 64,989.12 and 12,163.68

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Solution

The fourth proportional to 43,335.84, 64,989.12 and 12,163.68 is: 18,241.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,335.84 : 64,989.12 = 12,163.68 : x
  2. Step 2: Convert to fraction form
    43,335.84/64,989.12 = 12,163.68/x
  3. Step 3: Cross multiply
    43,335.84x = 64,989.12 × 12,163.68
  4. Step 4: Simplify right side
    43,335.84x = 790,506,859.16
  5. Step 5: Solve for x
    x = 790,506,859.16/43,335.84
  6. Step 6: Final answer
    x = 18,241.41

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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.