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Finding the Fourth Proportional to 123,234.56, 170,063.70 and 66,645.92

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Solution

The fourth proportional to 123,234.56, 170,063.70 and 66,645.92 is: 91,971.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,234.56 : 170,063.70 = 66,645.92 : x
  2. Step 2: Convert to fraction form
    123,234.56/170,063.70 = 66,645.92/x
  3. Step 3: Cross multiply
    123,234.56x = 170,063.70 × 66,645.92
  4. Step 4: Simplify right side
    123,234.56x = 11,334,051,745.10
  5. Step 5: Solve for x
    x = 11,334,051,745.10/123,234.56
  6. Step 6: Final answer
    x = 91,971.37

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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.