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Finding the Fourth Proportional to 111,378.36, 153,724.44 and 66,081.48

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Solution

The fourth proportional to 111,378.36, 153,724.44 and 66,081.48 is: 91,205.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,378.36 : 153,724.44 = 66,081.48 : x
  2. Step 2: Convert to fraction form
    111,378.36/153,724.44 = 66,081.48/x
  3. Step 3: Cross multiply
    111,378.36x = 153,724.44 × 66,081.48
  4. Step 4: Simplify right side
    111,378.36x = 10,158,338,507.37
  5. Step 5: Solve for x
    x = 10,158,338,507.37/111,378.36
  6. Step 6: Final answer
    x = 91,205.68

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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.