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Finding the Fourth Proportional to 73,698.70, 110,547.60 and 21,108.28

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Solution

The fourth proportional to 73,698.70, 110,547.60 and 21,108.28 is: 31,662.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,698.70 : 110,547.60 = 21,108.28 : x
  2. Step 2: Convert to fraction form
    73,698.70/110,547.60 = 21,108.28/x
  3. Step 3: Cross multiply
    73,698.70x = 110,547.60 × 21,108.28
  4. Step 4: Simplify right side
    73,698.70x = 2,333,469,694.13
  5. Step 5: Solve for x
    x = 2,333,469,694.13/73,698.70
  6. Step 6: Final answer
    x = 31,662.29

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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.