Home / 320,827,007.80-481,240,511.70-78,489,911.80

Finding the Fourth Proportional to 320,827,007.80, 481,240,511.70 and 78,489,911.80

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Solution

The fourth proportional to 320,827,007.80, 481,240,511.70 and 78,489,911.80 is: 117,734,867.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,827,007.80 : 481,240,511.70 = 78,489,911.80 : x
  2. Step 2: Convert to fraction form
    320,827,007.80/481,240,511.70 = 78,489,911.80/x
  3. Step 3: Cross multiply
    320,827,007.80x = 481,240,511.70 × 78,489,911.80
  4. Step 4: Simplify right side
    320,827,007.80x = 37,772,525,317,919,864
  5. Step 5: Solve for x
    x = 37,772,525,317,919,864/320,827,007.80
  6. Step 6: Final answer
    x = 117,734,867.70

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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.