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Finding the Fourth Proportional to 111,993.94, 154,551.60 and 61,692.94

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Solution

The fourth proportional to 111,993.94, 154,551.60 and 61,692.94 is: 85,136.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,993.94 : 154,551.60 = 61,692.94 : x
  2. Step 2: Convert to fraction form
    111,993.94/154,551.60 = 61,692.94/x
  3. Step 3: Cross multiply
    111,993.94x = 154,551.60 × 61,692.94
  4. Step 4: Simplify right side
    111,993.94x = 9,534,742,585.70
  5. Step 5: Solve for x
    x = 9,534,742,585.70/111,993.94
  6. Step 6: Final answer
    x = 85,136.24

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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.