Home / 143,578,977.22-198,137,963.13-78,388,879.30

Finding the Fourth Proportional to 143,578,977.22, 198,137,963.13 and 78,388,879.30

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Solution

The fourth proportional to 143,578,977.22, 198,137,963.13 and 78,388,879.30 is: 108,176,093.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,578,977.22 : 198,137,963.13 = 78,388,879.30 : x
  2. Step 2: Convert to fraction form
    143,578,977.22/198,137,963.13 = 78,388,879.30/x
  3. Step 3: Cross multiply
    143,578,977.22x = 198,137,963.13 × 78,388,879.30
  4. Step 4: Simplify right side
    143,578,977.22x = 15,531,812,876,545,420
  5. Step 5: Solve for x
    x = 15,531,812,876,545,420/143,578,977.22
  6. Step 6: Final answer
    x = 108,176,093.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.