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Finding the Fourth Proportional to 111,891.06, 154,408.95 and 61,590.06

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Solution

The fourth proportional to 111,891.06, 154,408.95 and 61,590.06 is: 84,993.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,891.06 : 154,408.95 = 61,590.06 : x
  2. Step 2: Convert to fraction form
    111,891.06/154,408.95 = 61,590.06/x
  3. Step 3: Cross multiply
    111,891.06x = 154,408.95 × 61,590.06
  4. Step 4: Simplify right side
    111,891.06x = 9,510,056,495.04
  5. Step 5: Solve for x
    x = 9,510,056,495.04/111,891.06
  6. Step 6: Final answer
    x = 84,993.89

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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.