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Finding the Fourth Proportional to 123,809.94, 170,857.74 and 67,221.33

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Solution

The fourth proportional to 123,809.94, 170,857.74 and 67,221.33 is: 92,765.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,809.94 : 170,857.74 = 67,221.33 : x
  2. Step 2: Convert to fraction form
    123,809.94/170,857.74 = 67,221.33/x
  3. Step 3: Cross multiply
    123,809.94x = 170,857.74 × 67,221.33
  4. Step 4: Simplify right side
    123,809.94x = 11,485,284,523.59
  5. Step 5: Solve for x
    x = 11,485,284,523.59/123,809.94
  6. Step 6: Final answer
    x = 92,765.45

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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.