Home / 143,578,974.72-198,137,959.68-78,388,876.80

Finding the Fourth Proportional to 143,578,974.72, 198,137,959.68 and 78,388,876.80

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Solution

The fourth proportional to 143,578,974.72, 198,137,959.68 and 78,388,876.80 is: 108,176,090.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,578,974.72 : 198,137,959.68 = 78,388,876.80 : x
  2. Step 2: Convert to fraction form
    143,578,974.72/198,137,959.68 = 78,388,876.80/x
  3. Step 3: Cross multiply
    143,578,974.72x = 198,137,959.68 × 78,388,876.80
  4. Step 4: Simplify right side
    143,578,974.72x = 15,531,812,110,758,888
  5. Step 5: Solve for x
    x = 15,531,812,110,758,888/143,578,974.72
  6. Step 6: Final answer
    x = 108,176,090.13

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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.