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Finding the Fourth Proportional to 17,080,978.80, 25,621,468.20 and 6,990,841.20

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Solution

The fourth proportional to 17,080,978.80, 25,621,468.20 and 6,990,841.20 is: 10,486,261.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,080,978.80 : 25,621,468.20 = 6,990,841.20 : x
  2. Step 2: Convert to fraction form
    17,080,978.80/25,621,468.20 = 6,990,841.20/x
  3. Step 3: Cross multiply
    17,080,978.80x = 25,621,468.20 × 6,990,841.20
  4. Step 4: Simplify right side
    17,080,978.80x = 179,115,615,497,049.84
  5. Step 5: Solve for x
    x = 179,115,615,497,049.84/17,080,978.80
  6. Step 6: Final answer
    x = 10,486,261.80

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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.