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Finding the Fourth Proportional to 141,687.16, 212,662.14 and 71,615.68

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Solution

The fourth proportional to 141,687.16, 212,662.14 and 71,615.68 is: 107,489.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,687.16 : 212,662.14 = 71,615.68 : x
  2. Step 2: Convert to fraction form
    141,687.16/212,662.14 = 71,615.68/x
  3. Step 3: Cross multiply
    141,687.16x = 212,662.14 × 71,615.68
  4. Step 4: Simplify right side
    141,687.16x = 15,229,943,766.36
  5. Step 5: Solve for x
    x = 15,229,943,766.36/141,687.16
  6. Step 6: Final answer
    x = 107,489.94

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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.