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Finding the Fourth Proportional to 71,405.96, 107,003.36 and 67,411.95

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Solution

The fourth proportional to 71,405.96, 107,003.36 and 67,411.95 is: 101,018.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,405.96 : 107,003.36 = 67,411.95 : x
  2. Step 2: Convert to fraction form
    71,405.96/107,003.36 = 67,411.95/x
  3. Step 3: Cross multiply
    71,405.96x = 107,003.36 × 67,411.95
  4. Step 4: Simplify right side
    71,405.96x = 7,213,304,921.42
  5. Step 5: Solve for x
    x = 7,213,304,921.42/71,405.96
  6. Step 6: Final answer
    x = 101,018.25

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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.