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Finding the Fourth Proportional to 72,709.77, 109,067.08 and 20,114.85

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Solution

The fourth proportional to 72,709.77, 109,067.08 and 20,114.85 is: 30,172.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,709.77 : 109,067.08 = 20,114.85 : x
  2. Step 2: Convert to fraction form
    72,709.77/109,067.08 = 20,114.85/x
  3. Step 3: Cross multiply
    72,709.77x = 109,067.08 × 20,114.85
  4. Step 4: Simplify right side
    72,709.77x = 2,193,867,308.23
  5. Step 5: Solve for x
    x = 2,193,867,308.23/72,709.77
  6. Step 6: Final answer
    x = 30,172.94

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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.