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Finding the Fourth Proportional to 80,493,312,019.20, 120,739,968,028.80 and 80,493,312,019.20

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Solution

The fourth proportional to 80,493,312,019.20, 120,739,968,028.80 and 80,493,312,019.20 is: 120,739,968,028.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,493,312,019.20 : 120,739,968,028.80 = 80,493,312,019.20 : x
  2. Step 2: Convert to fraction form
    80,493,312,019.20/120,739,968,028.80 = 80,493,312,019.20/x
  3. Step 3: Cross multiply
    80,493,312,019.20x = 120,739,968,028.80 × 80,493,312,019.20
  4. Step 4: Simplify right side
    80,493,312,019.20x = 9,718,759,919,730,431,098,880
  5. Step 5: Solve for x
    x = 9,718,759,919,730,431,098,880/80,493,312,019.20
  6. Step 6: Final answer
    x = 120,739,968,028.80

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1.5x scale

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.