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Finding the Fourth Proportional to 279,097.80, 418,743.90 and 121,439.40

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Solution

The fourth proportional to 279,097.80, 418,743.90 and 121,439.40 is: 182,201.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,097.80 : 418,743.90 = 121,439.40 : x
  2. Step 2: Convert to fraction form
    279,097.80/418,743.90 = 121,439.40/x
  3. Step 3: Cross multiply
    279,097.80x = 418,743.90 × 121,439.40
  4. Step 4: Simplify right side
    279,097.80x = 50,852,007,969.66
  5. Step 5: Solve for x
    x = 50,852,007,969.66/279,097.80
  6. Step 6: Final answer
    x = 182,201.39

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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.