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Finding the Fourth Proportional to 79,682.45, 119,523.76 and 20,518.25

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Solution

The fourth proportional to 79,682.45, 119,523.76 and 20,518.25 is: 30,777.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,682.45 : 119,523.76 = 20,518.25 : x
  2. Step 2: Convert to fraction form
    79,682.45/119,523.76 = 20,518.25/x
  3. Step 3: Cross multiply
    79,682.45x = 119,523.76 × 20,518.25
  4. Step 4: Simplify right side
    79,682.45x = 2,452,418,286.03
  5. Step 5: Solve for x
    x = 2,452,418,286.03/79,682.45
  6. Step 6: Final answer
    x = 30,777.40

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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.