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Finding the Fourth Proportional to 111,388.37, 153,724.09 and 63,640.69

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Solution

The fourth proportional to 111,388.37, 153,724.09 and 63,640.69 is: 87,828.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,388.37 : 153,724.09 = 63,640.69 : x
  2. Step 2: Convert to fraction form
    111,388.37/153,724.09 = 63,640.69/x
  3. Step 3: Cross multiply
    111,388.37x = 153,724.09 × 63,640.69
  4. Step 4: Simplify right side
    111,388.37x = 9,783,106,388.60
  5. Step 5: Solve for x
    x = 9,783,106,388.60/111,388.37
  6. Step 6: Final answer
    x = 87,828.80

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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.