Home / 143,408.82-197,908.96-78,880.78

Finding the Fourth Proportional to 143,408.82, 197,908.96 and 78,880.78

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Solution

The fourth proportional to 143,408.82, 197,908.96 and 78,880.78 is: 108,858.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,408.82 : 197,908.96 = 78,880.78 : x
  2. Step 2: Convert to fraction form
    143,408.82/197,908.96 = 78,880.78/x
  3. Step 3: Cross multiply
    143,408.82x = 197,908.96 × 78,880.78
  4. Step 4: Simplify right side
    143,408.82x = 15,611,213,133.79
  5. Step 5: Solve for x
    x = 15,611,213,133.79/143,408.82
  6. Step 6: Final answer
    x = 108,858.11

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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.