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Finding the Fourth Proportional to 279,125.20, 418,692.64 and 79,450.72

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Solution

The fourth proportional to 279,125.20, 418,692.64 and 79,450.72 is: 119,177.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,125.20 : 418,692.64 = 79,450.72 : x
  2. Step 2: Convert to fraction form
    279,125.20/418,692.64 = 79,450.72/x
  3. Step 3: Cross multiply
    279,125.20x = 418,692.64 × 79,450.72
  4. Step 4: Simplify right side
    279,125.20x = 33,265,431,706.70
  5. Step 5: Solve for x
    x = 33,265,431,706.70/279,125.20
  6. Step 6: Final answer
    x = 119,177.46

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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.