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Finding the Fourth Proportional to 123,879.97, 170,857.11 and 109,555.12

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Solution

The fourth proportional to 123,879.97, 170,857.11 and 109,555.12 is: 151,100.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,879.97 : 170,857.11 = 109,555.12 : x
  2. Step 2: Convert to fraction form
    123,879.97/170,857.11 = 109,555.12/x
  3. Step 3: Cross multiply
    123,879.97x = 170,857.11 × 109,555.12
  4. Step 4: Simplify right side
    123,879.97x = 18,718,271,188.90
  5. Step 5: Solve for x
    x = 18,718,271,188.90/123,879.97
  6. Step 6: Final answer
    x = 151,100.06

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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.