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Finding the Fourth Proportional to 123,188.30, 169,999.89 and 66,599.67

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Solution

The fourth proportional to 123,188.30, 169,999.89 and 66,599.67 is: 91,907.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,188.30 : 169,999.89 = 66,599.67 : x
  2. Step 2: Convert to fraction form
    123,188.30/169,999.89 = 66,599.67/x
  3. Step 3: Cross multiply
    123,188.30x = 169,999.89 × 66,599.67
  4. Step 4: Simplify right side
    123,188.30x = 11,321,936,574.04
  5. Step 5: Solve for x
    x = 11,321,936,574.04/123,188.30
  6. Step 6: Final answer
    x = 91,907.56

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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.