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Finding the Fourth Proportional to 71,599.40, 107,390.89 and 19,012.98

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Solution

The fourth proportional to 71,599.40, 107,390.89 and 19,012.98 is: 28,517.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,599.40 : 107,390.89 = 19,012.98 : x
  2. Step 2: Convert to fraction form
    71,599.40/107,390.89 = 19,012.98/x
  3. Step 3: Cross multiply
    71,599.40x = 107,390.89 × 19,012.98
  4. Step 4: Simplify right side
    71,599.40x = 2,041,820,843.75
  5. Step 5: Solve for x
    x = 2,041,820,843.75/71,599.40
  6. Step 6: Final answer
    x = 28,517.29

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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.