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Finding the Fourth Proportional to 139,669,600.80, 209,504,401.20 and 79,203,424.80

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Solution

The fourth proportional to 139,669,600.80, 209,504,401.20 and 79,203,424.80 is: 118,805,137.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,669,600.80 : 209,504,401.20 = 79,203,424.80 : x
  2. Step 2: Convert to fraction form
    139,669,600.80/209,504,401.20 = 79,203,424.80/x
  3. Step 3: Cross multiply
    139,669,600.80x = 209,504,401.20 × 79,203,424.80
  4. Step 4: Simplify right side
    139,669,600.80x = 16,593,466,085,713,228
  5. Step 5: Solve for x
    x = 16,593,466,085,713,228/139,669,600.80
  6. Step 6: Final answer
    x = 118,805,137.20

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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.