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Finding the Fourth Proportional to 123,797.75, 170,879.79 and 79,085.75

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Solution

The fourth proportional to 123,797.75, 170,879.79 and 79,085.75 is: 109,163.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,797.75 : 170,879.79 = 79,085.75 : x
  2. Step 2: Convert to fraction form
    123,797.75/170,879.79 = 79,085.75/x
  3. Step 3: Cross multiply
    123,797.75x = 170,879.79 × 79,085.75
  4. Step 4: Simplify right side
    123,797.75x = 13,514,156,351.99
  5. Step 5: Solve for x
    x = 13,514,156,351.99/123,797.75
  6. Step 6: Final answer
    x = 109,163.18

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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.