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Finding the Fourth Proportional to 120,885.81, 166,819.12 and 67,169.45

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Solution

The fourth proportional to 120,885.81, 166,819.12 and 67,169.45 is: 92,692.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,885.81 : 166,819.12 = 67,169.45 : x
  2. Step 2: Convert to fraction form
    120,885.81/166,819.12 = 67,169.45/x
  3. Step 3: Cross multiply
    120,885.81x = 166,819.12 × 67,169.45
  4. Step 4: Simplify right side
    120,885.81x = 11,205,148,539.88
  5. Step 5: Solve for x
    x = 11,205,148,539.88/120,885.81
  6. Step 6: Final answer
    x = 92,692.01

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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.