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Finding the Fourth Proportional to 279,410.39, 419,119.43 and 79,730.72

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Solution

The fourth proportional to 279,410.39, 419,119.43 and 79,730.72 is: 119,597.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,410.39 : 419,119.43 = 79,730.72 : x
  2. Step 2: Convert to fraction form
    279,410.39/419,119.43 = 79,730.72/x
  3. Step 3: Cross multiply
    279,410.39x = 419,119.43 × 79,730.72
  4. Step 4: Simplify right side
    279,410.39x = 33,416,691,824.29
  5. Step 5: Solve for x
    x = 33,416,691,824.29/279,410.39
  6. Step 6: Final answer
    x = 119,597.17

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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.