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Finding the Fourth Proportional to 111,539.76, 153,857.25 and 66,187.86

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Solution

The fourth proportional to 111,539.76, 153,857.25 and 66,187.86 is: 91,299.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,539.76 : 153,857.25 = 66,187.86 : x
  2. Step 2: Convert to fraction form
    111,539.76/153,857.25 = 66,187.86/x
  3. Step 3: Cross multiply
    111,539.76x = 153,857.25 × 66,187.86
  4. Step 4: Simplify right side
    111,539.76x = 10,183,482,122.99
  5. Step 5: Solve for x
    x = 10,183,482,122.99/111,539.76
  6. Step 6: Final answer
    x = 91,299.12

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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.