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Finding the Fourth Proportional to 199,646,237.70, 299,469,356.55 and 191,993,487.30

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Solution

The fourth proportional to 199,646,237.70, 299,469,356.55 and 191,993,487.30 is: 287,990,230.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,646,237.70 : 299,469,356.55 = 191,993,487.30 : x
  2. Step 2: Convert to fraction form
    199,646,237.70/299,469,356.55 = 191,993,487.30/x
  3. Step 3: Cross multiply
    199,646,237.70x = 299,469,356.55 × 191,993,487.30
  4. Step 4: Simplify right side
    199,646,237.70x = 57,496,166,103,521,600
  5. Step 5: Solve for x
    x = 57,496,166,103,521,600/199,646,237.70
  6. Step 6: Final answer
    x = 287,990,230.95

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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.