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Finding the Fourth Proportional to 39,795,642.99, 59,705,646.99 and 20,378,616.97

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Solution

The fourth proportional to 39,795,642.99, 59,705,646.99 and 20,378,616.97 is: 30,574,163.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,795,642.99 : 59,705,646.99 = 20,378,616.97 : x
  2. Step 2: Convert to fraction form
    39,795,642.99/59,705,646.99 = 20,378,616.97/x
  3. Step 3: Cross multiply
    39,795,642.99x = 59,705,646.99 × 20,378,616.97
  4. Step 4: Simplify right side
    39,795,642.99x = 1,216,718,510,955,243.50
  5. Step 5: Solve for x
    x = 1,216,718,510,955,243.50/39,795,642.99
  6. Step 6: Final answer
    x = 30,574,163.89

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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.