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Finding the Fourth Proportional to 71,992.26, 107,973.81 and 19,389.44

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Solution

The fourth proportional to 71,992.26, 107,973.81 and 19,389.44 is: 29,080.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,992.26 : 107,973.81 = 19,389.44 : x
  2. Step 2: Convert to fraction form
    71,992.26/107,973.81 = 19,389.44/x
  3. Step 3: Cross multiply
    71,992.26x = 107,973.81 × 19,389.44
  4. Step 4: Simplify right side
    71,992.26x = 2,093,551,980.50
  5. Step 5: Solve for x
    x = 2,093,551,980.50/71,992.26
  6. Step 6: Final answer
    x = 29,080.24

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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.