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Finding the Fourth Proportional to 279,025.80, 418,635.90 and 121,367.40

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Solution

The fourth proportional to 279,025.80, 418,635.90 and 121,367.40 is: 182,093.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,025.80 : 418,635.90 = 121,367.40 : x
  2. Step 2: Convert to fraction form
    279,025.80/418,635.90 = 121,367.40/x
  3. Step 3: Cross multiply
    279,025.80x = 418,635.90 × 121,367.40
  4. Step 4: Simplify right side
    279,025.80x = 50,808,750,729.66
  5. Step 5: Solve for x
    x = 50,808,750,729.66/279,025.80
  6. Step 6: Final answer
    x = 182,093.38

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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.