Home / 208,014,912.80-312,022,369.20-105,978,240.80

Finding the Fourth Proportional to 208,014,912.80, 312,022,369.20 and 105,978,240.80

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Solution

The fourth proportional to 208,014,912.80, 312,022,369.20 and 105,978,240.80 is: 158,967,361.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,014,912.80 : 312,022,369.20 = 105,978,240.80 : x
  2. Step 2: Convert to fraction form
    208,014,912.80/312,022,369.20 = 105,978,240.80/x
  3. Step 3: Cross multiply
    208,014,912.80x = 312,022,369.20 × 105,978,240.80
  4. Step 4: Simplify right side
    208,014,912.80x = 33,067,581,778,064,100
  5. Step 5: Solve for x
    x = 33,067,581,778,064,100/208,014,912.80
  6. Step 6: Final answer
    x = 158,967,361.20

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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.