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Finding the Fourth Proportional to 71,799.21, 107,737.70 and 69,181.29

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Solution

The fourth proportional to 71,799.21, 107,737.70 and 69,181.29 is: 103,809.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,799.21 : 107,737.70 = 69,181.29 : x
  2. Step 2: Convert to fraction form
    71,799.21/107,737.70 = 69,181.29/x
  3. Step 3: Cross multiply
    71,799.21x = 107,737.70 × 69,181.29
  4. Step 4: Simplify right side
    71,799.21x = 7,453,432,721.73
  5. Step 5: Solve for x
    x = 7,453,432,721.73/71,799.21
  6. Step 6: Final answer
    x = 103,809.40

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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.