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Finding the Fourth Proportional to 79,296, 109,428.48 and 47,469.48

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Solution

The fourth proportional to 79,296, 109,428.48 and 47,469.48 is: 65,507.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,296 : 109,428.48 = 47,469.48 : x
  2. Step 2: Convert to fraction form
    79,296/109,428.48 = 47,469.48/x
  3. Step 3: Cross multiply
    79,296x = 109,428.48 × 47,469.48
  4. Step 4: Simplify right side
    79,296x = 5,194,513,042.79
  5. Step 5: Solve for x
    x = 5,194,513,042.79/79,296
  6. Step 6: Final answer
    x = 65,507.88

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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.