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Finding the Fourth Proportional to 123,104.65, 169,771.65 and 80,686.57

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Solution

The fourth proportional to 123,104.65, 169,771.65 and 80,686.57 is: 111,273.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,104.65 : 169,771.65 = 80,686.57 : x
  2. Step 2: Convert to fraction form
    123,104.65/169,771.65 = 80,686.57/x
  3. Step 3: Cross multiply
    123,104.65x = 169,771.65 × 80,686.57
  4. Step 4: Simplify right side
    123,104.65x = 13,698,292,121.74
  5. Step 5: Solve for x
    x = 13,698,292,121.74/123,104.65
  6. Step 6: Final answer
    x = 111,273.56

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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.