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Finding the Fourth Proportional to 123,548.64, 170,497.72 and 66,959.84

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Solution

The fourth proportional to 123,548.64, 170,497.72 and 66,959.84 is: 92,404.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,548.64 : 170,497.72 = 66,959.84 : x
  2. Step 2: Convert to fraction form
    123,548.64/170,497.72 = 66,959.84/x
  3. Step 3: Cross multiply
    123,548.64x = 170,497.72 × 66,959.84
  4. Step 4: Simplify right side
    123,548.64x = 11,416,500,051.56
  5. Step 5: Solve for x
    x = 11,416,500,051.56/123,548.64
  6. Step 6: Final answer
    x = 92,404.90

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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.