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Finding the Fourth Proportional to 279,075.92, 418,610.46 and 68,715.68

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Solution

The fourth proportional to 279,075.92, 418,610.46 and 68,715.68 is: 103,072.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,075.92 : 418,610.46 = 68,715.68 : x
  2. Step 2: Convert to fraction form
    279,075.92/418,610.46 = 68,715.68/x
  3. Step 3: Cross multiply
    279,075.92x = 418,610.46 × 68,715.68
  4. Step 4: Simplify right side
    279,075.92x = 28,765,102,414.01
  5. Step 5: Solve for x
    x = 28,765,102,414.01/279,075.92
  6. Step 6: Final answer
    x = 103,072.68

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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.