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Finding the Fourth Proportional to 123,576.98, 170,536.44 and 66,988.48

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Solution

The fourth proportional to 123,576.98, 170,536.44 and 66,988.48 is: 92,444.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,576.98 : 170,536.44 = 66,988.48 : x
  2. Step 2: Convert to fraction form
    123,576.98/170,536.44 = 66,988.48/x
  3. Step 3: Cross multiply
    123,576.98x = 170,536.44 × 66,988.48
  4. Step 4: Simplify right side
    123,576.98x = 11,423,976,900.21
  5. Step 5: Solve for x
    x = 11,423,976,900.21/123,576.98
  6. Step 6: Final answer
    x = 92,444.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.