Home / 143,408.66-197,908.79-78,880.64

Finding the Fourth Proportional to 143,408.66, 197,908.79 and 78,880.64

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Solution

The fourth proportional to 143,408.66, 197,908.79 and 78,880.64 is: 108,857.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,408.66 : 197,908.79 = 78,880.64 : x
  2. Step 2: Convert to fraction form
    143,408.66/197,908.79 = 78,880.64/x
  3. Step 3: Cross multiply
    143,408.66x = 197,908.79 × 78,880.64
  4. Step 4: Simplify right side
    143,408.66x = 15,611,170,632.88
  5. Step 5: Solve for x
    x = 15,611,170,632.88/143,408.66
  6. Step 6: Final answer
    x = 108,857.94

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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.