Home / 143,503,839.12-198,035,245.10-78,313,743.12

Finding the Fourth Proportional to 143,503,839.12, 198,035,245.10 and 78,313,743.12

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Solution

The fourth proportional to 143,503,839.12, 198,035,245.10 and 78,313,743.12 is: 108,072,936.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,503,839.12 : 198,035,245.10 = 78,313,743.12 : x
  2. Step 2: Convert to fraction form
    143,503,839.12/198,035,245.10 = 78,313,743.12/x
  3. Step 3: Cross multiply
    143,503,839.12x = 198,035,245.10 × 78,313,743.12
  4. Step 4: Simplify right side
    143,503,839.12x = 15,508,881,313,467,640
  5. Step 5: Solve for x
    x = 15,508,881,313,467,640/143,503,839.12
  6. Step 6: Final answer
    x = 108,072,936.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.