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Finding the Fourth Proportional to 120,789.88, 166,694.21 and 67,075.80

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Solution

The fourth proportional to 120,789.88, 166,694.21 and 67,075.80 is: 92,566.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,789.88 : 166,694.21 = 67,075.80 : x
  2. Step 2: Convert to fraction form
    120,789.88/166,694.21 = 67,075.80/x
  3. Step 3: Cross multiply
    120,789.88x = 166,694.21 × 67,075.80
  4. Step 4: Simplify right side
    120,789.88x = 11,181,147,491.12
  5. Step 5: Solve for x
    x = 11,181,147,491.12/120,789.88
  6. Step 6: Final answer
    x = 92,566.92

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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.