Home / 419,280,515.20-628,920,772.80-128,147,075.20

Finding the Fourth Proportional to 419,280,515.20, 628,920,772.80 and 128,147,075.20

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Solution

The fourth proportional to 419,280,515.20, 628,920,772.80 and 128,147,075.20 is: 192,220,612.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,280,515.20 : 628,920,772.80 = 128,147,075.20 : x
  2. Step 2: Convert to fraction form
    419,280,515.20/628,920,772.80 = 128,147,075.20/x
  3. Step 3: Cross multiply
    419,280,515.20x = 628,920,772.80 × 128,147,075.20
  4. Step 4: Simplify right side
    419,280,515.20x = 80,594,357,566,843,712
  5. Step 5: Solve for x
    x = 80,594,357,566,843,712/419,280,515.20
  6. Step 6: Final answer
    x = 192,220,612.80

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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.