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Finding the Fourth Proportional to 73,104.62, 109,660.80 and 20,518.21

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Solution

The fourth proportional to 73,104.62, 109,660.80 and 20,518.21 is: 30,778.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,104.62 : 109,660.80 = 20,518.21 : x
  2. Step 2: Convert to fraction form
    73,104.62/109,660.80 = 20,518.21/x
  3. Step 3: Cross multiply
    73,104.62x = 109,660.80 × 20,518.21
  4. Step 4: Simplify right side
    73,104.62x = 2,250,043,323.17
  5. Step 5: Solve for x
    x = 2,250,043,323.17/73,104.62
  6. Step 6: Final answer
    x = 30,778.40

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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.