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Finding the Fourth Proportional to 279,101.70, 418,657.32 and 79,427.25

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Solution

The fourth proportional to 279,101.70, 418,657.32 and 79,427.25 is: 119,142.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,101.70 : 418,657.32 = 79,427.25 : x
  2. Step 2: Convert to fraction form
    279,101.70/418,657.32 = 79,427.25/x
  3. Step 3: Cross multiply
    279,101.70x = 418,657.32 × 79,427.25
  4. Step 4: Simplify right side
    279,101.70x = 33,252,799,619.97
  5. Step 5: Solve for x
    x = 33,252,799,619.97/279,101.70
  6. Step 6: Final answer
    x = 119,142.23

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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.