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Finding the Fourth Proportional to 199,876.70, 299,692.03 and 66,721.21

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Solution

The fourth proportional to 199,876.70, 299,692.03 and 66,721.21 is: 100,040.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,876.70 : 299,692.03 = 66,721.21 : x
  2. Step 2: Convert to fraction form
    199,876.70/299,692.03 = 66,721.21/x
  3. Step 3: Cross multiply
    199,876.70x = 299,692.03 × 66,721.21
  4. Step 4: Simplify right side
    199,876.70x = 19,995,814,868.96
  5. Step 5: Solve for x
    x = 19,995,814,868.96/199,876.70
  6. Step 6: Final answer
    x = 100,040.75

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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.