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Finding the Fourth Proportional to 279,418.95, 418,893.32 and 121,528.49

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Solution

The fourth proportional to 279,418.95, 418,893.32 and 121,528.49 is: 182,190.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,418.95 : 418,893.32 = 121,528.49 : x
  2. Step 2: Convert to fraction form
    279,418.95/418,893.32 = 121,528.49/x
  3. Step 3: Cross multiply
    279,418.95x = 418,893.32 × 121,528.49
  4. Step 4: Simplify right side
    279,418.95x = 50,907,470,860.04
  5. Step 5: Solve for x
    x = 50,907,470,860.04/279,418.95
  6. Step 6: Final answer
    x = 182,190.47

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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.