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Finding the Fourth Proportional to 69,167.16, 103,636.80 and 66,576.24

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Solution

The fourth proportional to 69,167.16, 103,636.80 and 66,576.24 is: 99,754.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,167.16 : 103,636.80 = 66,576.24 : x
  2. Step 2: Convert to fraction form
    69,167.16/103,636.80 = 66,576.24/x
  3. Step 3: Cross multiply
    69,167.16x = 103,636.80 × 66,576.24
  4. Step 4: Simplify right side
    69,167.16x = 6,899,748,469.63
  5. Step 5: Solve for x
    x = 6,899,748,469.63/69,167.16
  6. Step 6: Final answer
    x = 99,754.69

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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.