Home / 279,938,427.20-419,907,640.80-98,161,985.60

Finding the Fourth Proportional to 279,938,427.20, 419,907,640.80 and 98,161,985.60

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Solution

The fourth proportional to 279,938,427.20, 419,907,640.80 and 98,161,985.60 is: 147,242,978.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,938,427.20 : 419,907,640.80 = 98,161,985.60 : x
  2. Step 2: Convert to fraction form
    279,938,427.20/419,907,640.80 = 98,161,985.60/x
  3. Step 3: Cross multiply
    279,938,427.20x = 419,907,640.80 × 98,161,985.60
  4. Step 4: Simplify right side
    279,938,427.20x = 41,218,967,789,539,568
  5. Step 5: Solve for x
    x = 41,218,967,789,539,568/279,938,427.20
  6. Step 6: Final answer
    x = 147,242,978.40

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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.