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Finding the Fourth Proportional to 137,479, 189,692.22 and 80,896.60

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Solution

The fourth proportional to 137,479, 189,692.22 and 80,896.60 is: 111,620.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,479 : 189,692.22 = 80,896.60 : x
  2. Step 2: Convert to fraction form
    137,479/189,692.22 = 80,896.60/x
  3. Step 3: Cross multiply
    137,479x = 189,692.22 × 80,896.60
  4. Step 4: Simplify right side
    137,479x = 15,345,455,644.45
  5. Step 5: Solve for x
    x = 15,345,455,644.45/137,479
  6. Step 6: Final answer
    x = 111,620.36

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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.