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Finding the Fourth Proportional to 79,676.73, 109,938.87 and 49,469.40

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Solution

The fourth proportional to 79,676.73, 109,938.87 and 49,469.40 is: 68,258.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,676.73 : 109,938.87 = 49,469.40 : x
  2. Step 2: Convert to fraction form
    79,676.73/109,938.87 = 49,469.40/x
  3. Step 3: Cross multiply
    79,676.73x = 109,938.87 × 49,469.40
  4. Step 4: Simplify right side
    79,676.73x = 5,438,609,935.58
  5. Step 5: Solve for x
    x = 5,438,609,935.58/79,676.73
  6. Step 6: Final answer
    x = 68,258.45

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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.