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Finding the Fourth Proportional to 136,696.80, 205,045.20 and 127,839.45

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Solution

The fourth proportional to 136,696.80, 205,045.20 and 127,839.45 is: 191,759.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,696.80 : 205,045.20 = 127,839.45 : x
  2. Step 2: Convert to fraction form
    136,696.80/205,045.20 = 127,839.45/x
  3. Step 3: Cross multiply
    136,696.80x = 205,045.20 × 127,839.45
  4. Step 4: Simplify right side
    136,696.80x = 26,212,865,593.14
  5. Step 5: Solve for x
    x = 26,212,865,593.14/136,696.80
  6. Step 6: Final answer
    x = 191,759.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.