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Finding the Fourth Proportional to 111,776.40, 167,470.20 and 91,947.60

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Solution

The fourth proportional to 111,776.40, 167,470.20 and 91,947.60 is: 137,761.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,776.40 : 167,470.20 = 91,947.60 : x
  2. Step 2: Convert to fraction form
    111,776.40/167,470.20 = 91,947.60/x
  3. Step 3: Cross multiply
    111,776.40x = 167,470.20 × 91,947.60
  4. Step 4: Simplify right side
    111,776.40x = 15,398,482,961.52
  5. Step 5: Solve for x
    x = 15,398,482,961.52/111,776.40
  6. Step 6: Final answer
    x = 137,761.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.