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Finding the Fourth Proportional to 80,376.84, 120,477.78 and 68,654.52

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Solution

The fourth proportional to 80,376.84, 120,477.78 and 68,654.52 is: 102,907.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,376.84 : 120,477.78 = 68,654.52 : x
  2. Step 2: Convert to fraction form
    80,376.84/120,477.78 = 68,654.52/x
  3. Step 3: Cross multiply
    80,376.84x = 120,477.78 × 68,654.52
  4. Step 4: Simplify right side
    80,376.84x = 8,271,344,156.57
  5. Step 5: Solve for x
    x = 8,271,344,156.57/80,376.84
  6. Step 6: Final answer
    x = 102,907.06

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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.