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Finding the Fourth Proportional to 279,040.04, 418,561.68 and 68,676.56

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Solution

The fourth proportional to 279,040.04, 418,561.68 and 68,676.56 is: 103,015.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,040.04 : 418,561.68 = 68,676.56 : x
  2. Step 2: Convert to fraction form
    279,040.04/418,561.68 = 68,676.56/x
  3. Step 3: Cross multiply
    279,040.04x = 418,561.68 × 68,676.56
  4. Step 4: Simplify right side
    279,040.04x = 28,745,376,330.22
  5. Step 5: Solve for x
    x = 28,745,376,330.22/279,040.04
  6. Step 6: Final answer
    x = 103,015.24

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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.