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Finding the Fourth Proportional to 71,994.93, 107,985.11 and 19,409.73

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Solution

The fourth proportional to 71,994.93, 107,985.11 and 19,409.73 is: 29,112.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,994.93 : 107,985.11 = 19,409.73 : x
  2. Step 2: Convert to fraction form
    71,994.93/107,985.11 = 19,409.73/x
  3. Step 3: Cross multiply
    71,994.93x = 107,985.11 × 19,409.73
  4. Step 4: Simplify right side
    71,994.93x = 2,095,961,732.07
  5. Step 5: Solve for x
    x = 2,095,961,732.07/71,994.93
  6. Step 6: Final answer
    x = 29,112.63

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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.