Home / 78,584,563.20-117,876,844.80-40,320,811.20

Finding the Fourth Proportional to 78,584,563.20, 117,876,844.80 and 40,320,811.20

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Solution

The fourth proportional to 78,584,563.20, 117,876,844.80 and 40,320,811.20 is: 60,481,216.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,584,563.20 : 117,876,844.80 = 40,320,811.20 : x
  2. Step 2: Convert to fraction form
    78,584,563.20/117,876,844.80 = 40,320,811.20/x
  3. Step 3: Cross multiply
    78,584,563.20x = 117,876,844.80 × 40,320,811.20
  4. Step 4: Simplify right side
    78,584,563.20x = 4,752,890,004,032,502
  5. Step 5: Solve for x
    x = 4,752,890,004,032,502/78,584,563.20
  6. Step 6: Final answer
    x = 60,481,216.80

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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.