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Finding the Fourth Proportional to 196,996.40, 295,408.20 and 78,628.40

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Solution

The fourth proportional to 196,996.40, 295,408.20 and 78,628.40 is: 117,908.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    196,996.40 : 295,408.20 = 78,628.40 : x
  2. Step 2: Convert to fraction form
    196,996.40/295,408.20 = 78,628.40/x
  3. Step 3: Cross multiply
    196,996.40x = 295,408.20 × 78,628.40
  4. Step 4: Simplify right side
    196,996.40x = 23,227,474,112.88
  5. Step 5: Solve for x
    x = 23,227,474,112.88/196,996.40
  6. Step 6: Final answer
    x = 117,908.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.