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Finding the Fourth Proportional to 111,993.89, 154,551.58 and 61,692.89

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Solution

The fourth proportional to 111,993.89, 154,551.58 and 61,692.89 is: 85,136.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,993.89 : 154,551.58 = 61,692.89 : x
  2. Step 2: Convert to fraction form
    111,993.89/154,551.58 = 61,692.89/x
  3. Step 3: Cross multiply
    111,993.89x = 154,551.58 × 61,692.89
  4. Step 4: Simplify right side
    111,993.89x = 9,534,732,697.28
  5. Step 5: Solve for x
    x = 9,534,732,697.28/111,993.89
  6. Step 6: Final answer
    x = 85,136.19

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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.