Home / 279,938,470.40-419,907,705.60-85,879,836.80

Finding the Fourth Proportional to 279,938,470.40, 419,907,705.60 and 85,879,836.80

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Solution

The fourth proportional to 279,938,470.40, 419,907,705.60 and 85,879,836.80 is: 128,819,755.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,938,470.40 : 419,907,705.60 = 85,879,836.80 : x
  2. Step 2: Convert to fraction form
    279,938,470.40/419,907,705.60 = 85,879,836.80/x
  3. Step 3: Cross multiply
    279,938,470.40x = 419,907,705.60 × 85,879,836.80
  4. Step 4: Simplify right side
    279,938,470.40x = 36,061,605,227,990,448
  5. Step 5: Solve for x
    x = 36,061,605,227,990,448/279,938,470.40
  6. Step 6: Final answer
    x = 128,819,755.20

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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.