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Finding the Fourth Proportional to 123,213.79, 170,034.91 and 66,625.03

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Solution

The fourth proportional to 123,213.79, 170,034.91 and 66,625.03 is: 91,942.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,213.79 : 170,034.91 = 66,625.03 : x
  2. Step 2: Convert to fraction form
    123,213.79/170,034.91 = 66,625.03/x
  3. Step 3: Cross multiply
    123,213.79x = 170,034.91 × 66,625.03
  4. Step 4: Simplify right side
    123,213.79x = 11,328,581,400.54
  5. Step 5: Solve for x
    x = 11,328,581,400.54/123,213.79
  6. Step 6: Final answer
    x = 91,942.48

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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.