Home / 85,343,468.43-128,015,534.77-20,647,169.69

Finding the Fourth Proportional to 85,343,468.43, 128,015,534.77 and 20,647,169.69

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Solution

The fourth proportional to 85,343,468.43, 128,015,534.77 and 20,647,169.69 is: 30,970,834.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,343,468.43 : 128,015,534.77 = 20,647,169.69 : x
  2. Step 2: Convert to fraction form
    85,343,468.43/128,015,534.77 = 20,647,169.69/x
  3. Step 3: Cross multiply
    85,343,468.43x = 128,015,534.77 × 20,647,169.69
  4. Step 4: Simplify right side
    85,343,468.43x = 2,643,158,468,660,589.50
  5. Step 5: Solve for x
    x = 2,643,158,468,660,589.50/85,343,468.43
  6. Step 6: Final answer
    x = 30,970,834.88

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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.