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Finding the Fourth Proportional to 72,797.99, 109,197.60 and 20,211.58

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Solution

The fourth proportional to 72,797.99, 109,197.60 and 20,211.58 is: 30,317.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,797.99 : 109,197.60 = 20,211.58 : x
  2. Step 2: Convert to fraction form
    72,797.99/109,197.60 = 20,211.58/x
  3. Step 3: Cross multiply
    72,797.99x = 109,197.60 × 20,211.58
  4. Step 4: Simplify right side
    72,797.99x = 2,207,055,755.21
  5. Step 5: Solve for x
    x = 2,207,055,755.21/72,797.99
  6. Step 6: Final answer
    x = 30,317.54

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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.