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Finding the Fourth Proportional to 189,456.66, 261,544.80 and 117,859.94

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Solution

The fourth proportional to 189,456.66, 261,544.80 and 117,859.94 is: 162,705.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,456.66 : 261,544.80 = 117,859.94 : x
  2. Step 2: Convert to fraction form
    189,456.66/261,544.80 = 117,859.94/x
  3. Step 3: Cross multiply
    189,456.66x = 261,544.80 × 117,859.94
  4. Step 4: Simplify right side
    189,456.66x = 30,825,654,435.31
  5. Step 5: Solve for x
    x = 30,825,654,435.31/189,456.66
  6. Step 6: Final answer
    x = 162,705.57

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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.