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Finding the Fourth Proportional to 279,937,379.60, 419,906,069.40 and 118,379,315.60

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Solution

The fourth proportional to 279,937,379.60, 419,906,069.40 and 118,379,315.60 is: 177,568,973.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,937,379.60 : 419,906,069.40 = 118,379,315.60 : x
  2. Step 2: Convert to fraction form
    279,937,379.60/419,906,069.40 = 118,379,315.60/x
  3. Step 3: Cross multiply
    279,937,379.60x = 419,906,069.40 × 118,379,315.60
  4. Step 4: Simplify right side
    279,937,379.60x = 49,708,193,111,858,096
  5. Step 5: Solve for x
    x = 49,708,193,111,858,096/279,937,379.60
  6. Step 6: Final answer
    x = 177,568,973.40

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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.