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Finding the Fourth Proportional to 219,139, 328,734.42 and 71,395

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Solution

The fourth proportional to 219,139, 328,734.42 and 71,395 is: 107,100.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,139 : 328,734.42 = 71,395 : x
  2. Step 2: Convert to fraction form
    219,139/328,734.42 = 71,395/x
  3. Step 3: Cross multiply
    219,139x = 328,734.42 × 71,395
  4. Step 4: Simplify right side
    219,139x = 23,469,993,915.90
  5. Step 5: Solve for x
    x = 23,469,993,915.90/219,139
  6. Step 6: Final answer
    x = 107,100.94

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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.