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Finding the Fourth Proportional to 279,430.67, 418,910.90 and 121,540.20

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Solution

The fourth proportional to 279,430.67, 418,910.90 and 121,540.20 is: 182,208.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,430.67 : 418,910.90 = 121,540.20 : x
  2. Step 2: Convert to fraction form
    279,430.67/418,910.90 = 121,540.20/x
  3. Step 3: Cross multiply
    279,430.67x = 418,910.90 × 121,540.20
  4. Step 4: Simplify right side
    279,430.67x = 50,914,515,987.17
  5. Step 5: Solve for x
    x = 50,914,515,987.17/279,430.67
  6. Step 6: Final answer
    x = 182,208.05

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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.