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Finding the Fourth Proportional to 79,940.68, 119,910.48 and 20,776.12

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Solution

The fourth proportional to 79,940.68, 119,910.48 and 20,776.12 is: 31,164.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,940.68 : 119,910.48 = 20,776.12 : x
  2. Step 2: Convert to fraction form
    79,940.68/119,910.48 = 20,776.12/x
  3. Step 3: Cross multiply
    79,940.68x = 119,910.48 × 20,776.12
  4. Step 4: Simplify right side
    79,940.68x = 2,491,274,521.74
  5. Step 5: Solve for x
    x = 2,491,274,521.74/79,940.68
  6. Step 6: Final answer
    x = 31,164.04

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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.