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Finding the Fourth Proportional to 80,486.30, 120,855.82 and 68,167.82

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Solution

The fourth proportional to 80,486.30, 120,855.82 and 68,167.82 is: 102,358.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,486.30 : 120,855.82 = 68,167.82 : x
  2. Step 2: Convert to fraction form
    80,486.30/120,855.82 = 68,167.82/x
  3. Step 3: Cross multiply
    80,486.30x = 120,855.82 × 68,167.82
  4. Step 4: Simplify right side
    80,486.30x = 8,238,477,783.71
  5. Step 5: Solve for x
    x = 8,238,477,783.71/80,486.30
  6. Step 6: Final answer
    x = 102,358.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.