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Finding the Fourth Proportional to 79,122.70, 109,198.01 and 50,443.38

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Solution

The fourth proportional to 79,122.70, 109,198.01 and 50,443.38 is: 69,617.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,122.70 : 109,198.01 = 50,443.38 : x
  2. Step 2: Convert to fraction form
    79,122.70/109,198.01 = 50,443.38/x
  3. Step 3: Cross multiply
    79,122.70x = 109,198.01 × 50,443.38
  4. Step 4: Simplify right side
    79,122.70x = 5,508,317,075.97
  5. Step 5: Solve for x
    x = 5,508,317,075.97/79,122.70
  6. Step 6: Final answer
    x = 69,617.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.