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Finding the Fourth Proportional to 121,409.80, 167,825.46 and 121,409.80

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Solution

The fourth proportional to 121,409.80, 167,825.46 and 121,409.80 is: 167,825.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,409.80 : 167,825.46 = 121,409.80 : x
  2. Step 2: Convert to fraction form
    121,409.80/167,825.46 = 121,409.80/x
  3. Step 3: Cross multiply
    121,409.80x = 167,825.46 × 121,409.80
  4. Step 4: Simplify right side
    121,409.80x = 20,375,655,533.51
  5. Step 5: Solve for x
    x = 20,375,655,533.51/121,409.80
  6. Step 6: Final answer
    x = 167,825.46

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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.