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Finding the Fourth Proportional to 71,601.90, 107,394.62 and 19,015.50

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Solution

The fourth proportional to 71,601.90, 107,394.62 and 19,015.50 is: 28,521.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,601.90 : 107,394.62 = 19,015.50 : x
  2. Step 2: Convert to fraction form
    71,601.90/107,394.62 = 19,015.50/x
  3. Step 3: Cross multiply
    71,601.90x = 107,394.62 × 19,015.50
  4. Step 4: Simplify right side
    71,601.90x = 2,042,162,396.61
  5. Step 5: Solve for x
    x = 2,042,162,396.61/71,601.90
  6. Step 6: Final answer
    x = 28,521.06

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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.