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Finding the Fourth Proportional to 279,058.88, 418,578.90 and 121,287.34

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Solution

The fourth proportional to 279,058.88, 418,578.90 and 121,287.34 is: 181,926.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,058.88 : 418,578.90 = 121,287.34 : x
  2. Step 2: Convert to fraction form
    279,058.88/418,578.90 = 121,287.34/x
  3. Step 3: Cross multiply
    279,058.88x = 418,578.90 × 121,287.34
  4. Step 4: Simplify right side
    279,058.88x = 50,768,321,361.13
  5. Step 5: Solve for x
    x = 50,768,321,361.13/279,058.88
  6. Step 6: Final answer
    x = 181,926.92

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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.