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Finding the Fourth Proportional to 123,247.90, 170,082.11 and 66,659.28

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Solution

The fourth proportional to 123,247.90, 170,082.11 and 66,659.28 is: 91,989.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,247.90 : 170,082.11 = 66,659.28 : x
  2. Step 2: Convert to fraction form
    123,247.90/170,082.11 = 66,659.28/x
  3. Step 3: Cross multiply
    123,247.90x = 170,082.11 × 66,659.28
  4. Step 4: Simplify right side
    123,247.90x = 11,337,550,522.32
  5. Step 5: Solve for x
    x = 11,337,550,522.32/123,247.90
  6. Step 6: Final answer
    x = 91,989.81

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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.