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Finding the Fourth Proportional to 123,340, 170,209.20 and 66,751.80

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Solution

The fourth proportional to 123,340, 170,209.20 and 66,751.80 is: 92,117.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,340 : 170,209.20 = 66,751.80 : x
  2. Step 2: Convert to fraction form
    123,340/170,209.20 = 66,751.80/x
  3. Step 3: Cross multiply
    123,340x = 170,209.20 × 66,751.80
  4. Step 4: Simplify right side
    123,340x = 11,361,770,476.56
  5. Step 5: Solve for x
    x = 11,361,770,476.56/123,340
  6. Step 6: Final answer
    x = 92,117.48

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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.