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Finding the Fourth Proportional to 123,191.61, 170,004.81 and 66,603.39

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Solution

The fourth proportional to 123,191.61, 170,004.81 and 66,603.39 is: 91,912.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,191.61 : 170,004.81 = 66,603.39 : x
  2. Step 2: Convert to fraction form
    123,191.61/170,004.81 = 66,603.39/x
  3. Step 3: Cross multiply
    123,191.61x = 170,004.81 × 66,603.39
  4. Step 4: Simplify right side
    123,191.61x = 11,322,896,662.31
  5. Step 5: Solve for x
    x = 11,322,896,662.31/123,191.61
  6. Step 6: Final answer
    x = 91,912.89

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1.5x scale

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.