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Finding the Fourth Proportional to 111,661.60, 154,091.28 and 61,359.52

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Solution

The fourth proportional to 111,661.60, 154,091.28 and 61,359.52 is: 84,675.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,661.60 : 154,091.28 = 61,359.52 : x
  2. Step 2: Convert to fraction form
    111,661.60/154,091.28 = 61,359.52/x
  3. Step 3: Cross multiply
    111,661.60x = 154,091.28 × 61,359.52
  4. Step 4: Simplify right side
    111,661.60x = 9,454,966,976.99
  5. Step 5: Solve for x
    x = 9,454,966,976.99/111,661.60
  6. Step 6: Final answer
    x = 84,675.19

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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.