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Finding the Fourth Proportional to 64,378,992.80, 96,568,489.20 and 38,806,839.20

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Solution

The fourth proportional to 64,378,992.80, 96,568,489.20 and 38,806,839.20 is: 58,210,258.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,378,992.80 : 96,568,489.20 = 38,806,839.20 : x
  2. Step 2: Convert to fraction form
    64,378,992.80/96,568,489.20 = 38,806,839.20/x
  3. Step 3: Cross multiply
    64,378,992.80x = 96,568,489.20 × 38,806,839.20
  4. Step 4: Simplify right side
    64,378,992.80x = 3,747,517,832,171,337
  5. Step 5: Solve for x
    x = 3,747,517,832,171,337/64,378,992.80
  6. Step 6: Final answer
    x = 58,210,258.80

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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.