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Finding the Fourth Proportional to 79,954.92, 119,934 and 20,787.12

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Solution

The fourth proportional to 79,954.92, 119,934 and 20,787.12 is: 31,181.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,954.92 : 119,934 = 20,787.12 : x
  2. Step 2: Convert to fraction form
    79,954.92/119,934 = 20,787.12/x
  3. Step 3: Cross multiply
    79,954.92x = 119,934 × 20,787.12
  4. Step 4: Simplify right side
    79,954.92x = 2,493,082,450.08
  5. Step 5: Solve for x
    x = 2,493,082,450.08/79,954.92
  6. Step 6: Final answer
    x = 31,181.10

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1.5x scale

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.