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Finding the Fourth Proportional to 111,857.45, 154,363.58 and 61,556.45

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Solution

The fourth proportional to 111,857.45, 154,363.58 and 61,556.45 is: 84,948.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,857.45 : 154,363.58 = 61,556.45 : x
  2. Step 2: Convert to fraction form
    111,857.45/154,363.58 = 61,556.45/x
  3. Step 3: Cross multiply
    111,857.45x = 154,363.58 × 61,556.45
  4. Step 4: Simplify right side
    111,857.45x = 9,502,072,914.49
  5. Step 5: Solve for x
    x = 9,502,072,914.49/111,857.45
  6. Step 6: Final answer
    x = 84,948.06

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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.