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Finding the Fourth Proportional to 279,170.60, 418,626.30 and 121,317.80

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Solution

The fourth proportional to 279,170.60, 418,626.30 and 121,317.80 is: 181,920.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,170.60 : 418,626.30 = 121,317.80 : x
  2. Step 2: Convert to fraction form
    279,170.60/418,626.30 = 121,317.80/x
  3. Step 3: Cross multiply
    279,170.60x = 418,626.30 × 121,317.80
  4. Step 4: Simplify right side
    279,170.60x = 50,786,821,738.14
  5. Step 5: Solve for x
    x = 50,786,821,738.14/279,170.60
  6. Step 6: Final answer
    x = 181,920.38

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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.