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Finding the Fourth Proportional to 127,616.49, 190,115.13 and 121,859.22

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Solution

The fourth proportional to 127,616.49, 190,115.13 and 121,859.22 is: 181,538.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,616.49 : 190,115.13 = 121,859.22 : x
  2. Step 2: Convert to fraction form
    127,616.49/190,115.13 = 121,859.22/x
  3. Step 3: Cross multiply
    127,616.49x = 190,115.13 × 121,859.22
  4. Step 4: Simplify right side
    127,616.49x = 23,167,281,452.00
  5. Step 5: Solve for x
    x = 23,167,281,452.00/127,616.49
  6. Step 6: Final answer
    x = 181,538.31

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.