Home / 209,990,761.46-315,001,277.49-80,598,371.78

Finding the Fourth Proportional to 209,990,761.46, 315,001,277.49 and 80,598,371.78

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Solution

The fourth proportional to 209,990,761.46, 315,001,277.49 and 80,598,371.78 is: 120,903,366.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,990,761.46 : 315,001,277.49 = 80,598,371.78 : x
  2. Step 2: Convert to fraction form
    209,990,761.46/315,001,277.49 = 80,598,371.78/x
  3. Step 3: Cross multiply
    209,990,761.46x = 315,001,277.49 × 80,598,371.78
  4. Step 4: Simplify right side
    209,990,761.46x = 25,388,590,072,738,960
  5. Step 5: Solve for x
    x = 25,388,590,072,738,960/209,990,761.46
  6. Step 6: Final answer
    x = 120,903,366.88

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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.