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Finding the Fourth Proportional to 123,573.97, 170,532.30 and 66,985.48

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Solution

The fourth proportional to 123,573.97, 170,532.30 and 66,985.48 is: 92,440.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,573.97 : 170,532.30 = 66,985.48 : x
  2. Step 2: Convert to fraction form
    123,573.97/170,532.30 = 66,985.48/x
  3. Step 3: Cross multiply
    123,573.97x = 170,532.30 × 66,985.48
  4. Step 4: Simplify right side
    123,573.97x = 11,423,187,971.00
  5. Step 5: Solve for x
    x = 11,423,187,971.00/123,573.97
  6. Step 6: Final answer
    x = 92,440.08

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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.