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Finding the Fourth Proportional to 279,049.12, 418,643.90 and 79,369.54

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Solution

The fourth proportional to 279,049.12, 418,643.90 and 79,369.54 is: 119,074.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,049.12 : 418,643.90 = 79,369.54 : x
  2. Step 2: Convert to fraction form
    279,049.12/418,643.90 = 79,369.54/x
  3. Step 3: Cross multiply
    279,049.12x = 418,643.90 × 79,369.54
  4. Step 4: Simplify right side
    279,049.12x = 33,227,573,766.81
  5. Step 5: Solve for x
    x = 33,227,573,766.81/279,049.12
  6. Step 6: Final answer
    x = 119,074.28

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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.