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Finding the Fourth Proportional to 111,937.49, 154,470.17 and 66,605.10

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Solution

The fourth proportional to 111,937.49, 154,470.17 and 66,605.10 is: 91,912.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,937.49 : 154,470.17 = 66,605.10 : x
  2. Step 2: Convert to fraction form
    111,937.49/154,470.17 = 66,605.10/x
  3. Step 3: Cross multiply
    111,937.49x = 154,470.17 × 66,605.10
  4. Step 4: Simplify right side
    111,937.49x = 10,288,501,119.87
  5. Step 5: Solve for x
    x = 10,288,501,119.87/111,937.49
  6. Step 6: Final answer
    x = 91,912.92

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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.