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Finding the Fourth Proportional to 111,904.70, 154,435.48 and 61,603.70

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Solution

The fourth proportional to 111,904.70, 154,435.48 and 61,603.70 is: 85,016.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,904.70 : 154,435.48 = 61,603.70 : x
  2. Step 2: Convert to fraction form
    111,904.70/154,435.48 = 61,603.70/x
  3. Step 3: Cross multiply
    111,904.70x = 154,435.48 × 61,603.70
  4. Step 4: Simplify right side
    111,904.70x = 9,513,796,979.28
  5. Step 5: Solve for x
    x = 9,513,796,979.28/111,904.70
  6. Step 6: Final answer
    x = 85,016.96

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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.