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Finding the Fourth Proportional to 111,995.12, 154,553 and 61,694.16

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Solution

The fourth proportional to 111,995.12, 154,553 and 61,694.16 is: 85,137.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,995.12 : 154,553 = 61,694.16 : x
  2. Step 2: Convert to fraction form
    111,995.12/154,553 = 61,694.16/x
  3. Step 3: Cross multiply
    111,995.12x = 154,553 × 61,694.16
  4. Step 4: Simplify right side
    111,995.12x = 9,535,017,510.48
  5. Step 5: Solve for x
    x = 9,535,017,510.48/111,995.12
  6. Step 6: Final answer
    x = 85,137.79

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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.