Home / 143,578,975.72-198,137,961.06-78,388,877.80

Finding the Fourth Proportional to 143,578,975.72, 198,137,961.06 and 78,388,877.80

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Solution

The fourth proportional to 143,578,975.72, 198,137,961.06 and 78,388,877.80 is: 108,176,091.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,578,975.72 : 198,137,961.06 = 78,388,877.80 : x
  2. Step 2: Convert to fraction form
    143,578,975.72/198,137,961.06 = 78,388,877.80/x
  3. Step 3: Cross multiply
    143,578,975.72x = 198,137,961.06 × 78,388,877.80
  4. Step 4: Simplify right side
    143,578,975.72x = 15,531,812,417,073,498
  5. Step 5: Solve for x
    x = 15,531,812,417,073,498/143,578,975.72
  6. Step 6: Final answer
    x = 108,176,091.51

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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.