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Finding the Fourth Proportional to 79,296, 109,428.48 and 43,968

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Solution

The fourth proportional to 79,296, 109,428.48 and 43,968 is: 60,675.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,296 : 109,428.48 = 43,968 : x
  2. Step 2: Convert to fraction form
    79,296/109,428.48 = 43,968/x
  3. Step 3: Cross multiply
    79,296x = 109,428.48 × 43,968
  4. Step 4: Simplify right side
    79,296x = 4,811,351,408.64
  5. Step 5: Solve for x
    x = 4,811,351,408.64/79,296
  6. Step 6: Final answer
    x = 60,675.84

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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.