Home / 279,938,339.90-419,907,509.85-85,879,706.30

Finding the Fourth Proportional to 279,938,339.90, 419,907,509.85 and 85,879,706.30

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Solution

The fourth proportional to 279,938,339.90, 419,907,509.85 and 85,879,706.30 is: 128,819,559.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,938,339.90 : 419,907,509.85 = 85,879,706.30 : x
  2. Step 2: Convert to fraction form
    279,938,339.90/419,907,509.85 = 85,879,706.30/x
  3. Step 3: Cross multiply
    279,938,339.90x = 419,907,509.85 × 85,879,706.30
  4. Step 4: Simplify right side
    279,938,339.90x = 36,061,533,619,082,360
  5. Step 5: Solve for x
    x = 36,061,533,619,082,360/279,938,339.90
  6. Step 6: Final answer
    x = 128,819,559.45

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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.