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Finding the Fourth Proportional to 279,137.58, 418,643.48 and 79,453.55

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Solution

The fourth proportional to 279,137.58, 418,643.48 and 79,453.55 is: 119,162.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,137.58 : 418,643.48 = 79,453.55 : x
  2. Step 2: Convert to fraction form
    279,137.58/418,643.48 = 79,453.55/x
  3. Step 3: Cross multiply
    279,137.58x = 418,643.48 × 79,453.55
  4. Step 4: Simplify right side
    279,137.58x = 33,262,708,775.77
  5. Step 5: Solve for x
    x = 33,262,708,775.77/279,137.58
  6. Step 6: Final answer
    x = 119,162.42

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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.