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Finding the Fourth Proportional to 71,930.80, 107,896.02 and 19,340.28

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Solution

The fourth proportional to 71,930.80, 107,896.02 and 19,340.28 is: 29,010.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,930.80 : 107,896.02 = 19,340.28 : x
  2. Step 2: Convert to fraction form
    71,930.80/107,896.02 = 19,340.28/x
  3. Step 3: Cross multiply
    71,930.80x = 107,896.02 × 19,340.28
  4. Step 4: Simplify right side
    71,930.80x = 2,086,739,237.69
  5. Step 5: Solve for x
    x = 2,086,739,237.69/71,930.80
  6. Step 6: Final answer
    x = 29,010.37

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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.