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Finding the Fourth Proportional to 279,074.26, 418,611.39 and 68,712.20

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Solution

The fourth proportional to 279,074.26, 418,611.39 and 68,712.20 is: 103,068.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,074.26 : 418,611.39 = 68,712.20 : x
  2. Step 2: Convert to fraction form
    279,074.26/418,611.39 = 68,712.20/x
  3. Step 3: Cross multiply
    279,074.26x = 418,611.39 × 68,712.20
  4. Step 4: Simplify right side
    279,074.26x = 28,763,709,157.53
  5. Step 5: Solve for x
    x = 28,763,709,157.53/279,074.26
  6. Step 6: Final answer
    x = 103,068.30

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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.