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Finding the Fourth Proportional to 71,895.40, 107,310.80 and 67,463.08

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Solution

The fourth proportional to 71,895.40, 107,310.80 and 67,463.08 is: 100,695.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,895.40 : 107,310.80 = 67,463.08 : x
  2. Step 2: Convert to fraction form
    71,895.40/107,310.80 = 67,463.08/x
  3. Step 3: Cross multiply
    71,895.40x = 107,310.80 × 67,463.08
  4. Step 4: Simplify right side
    71,895.40x = 7,239,517,085.26
  5. Step 5: Solve for x
    x = 7,239,517,085.26/71,895.40
  6. Step 6: Final answer
    x = 100,695.14

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.