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Finding the Fourth Proportional to 111,366.74, 153,708.44 and 66,069.87

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Solution

The fourth proportional to 111,366.74, 153,708.44 and 66,069.87 is: 91,189.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,366.74 : 153,708.44 = 66,069.87 : x
  2. Step 2: Convert to fraction form
    111,366.74/153,708.44 = 66,069.87/x
  3. Step 3: Cross multiply
    111,366.74x = 153,708.44 × 66,069.87
  4. Step 4: Simplify right side
    111,366.74x = 10,155,496,318.35
  5. Step 5: Solve for x
    x = 10,155,496,318.35/111,366.74
  6. Step 6: Final answer
    x = 91,189.67

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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.