Home / 214,621,990.80-321,932,986.20-78,262,054.80

Finding the Fourth Proportional to 214,621,990.80, 321,932,986.20 and 78,262,054.80

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Solution

The fourth proportional to 214,621,990.80, 321,932,986.20 and 78,262,054.80 is: 117,393,082.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,621,990.80 : 321,932,986.20 = 78,262,054.80 : x
  2. Step 2: Convert to fraction form
    214,621,990.80/321,932,986.20 = 78,262,054.80/x
  3. Step 3: Cross multiply
    214,621,990.80x = 321,932,986.20 × 78,262,054.80
  4. Step 4: Simplify right side
    214,621,990.80x = 25,195,137,007,912,040
  5. Step 5: Solve for x
    x = 25,195,137,007,912,040/214,621,990.80
  6. Step 6: Final answer
    x = 117,393,082.20

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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.