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Finding the Fourth Proportional to 120,802.68, 166,680.81 and 73,054.98

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Solution

The fourth proportional to 120,802.68, 166,680.81 and 73,054.98 is: 100,799.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,802.68 : 166,680.81 = 73,054.98 : x
  2. Step 2: Convert to fraction form
    120,802.68/166,680.81 = 73,054.98/x
  3. Step 3: Cross multiply
    120,802.68x = 166,680.81 × 73,054.98
  4. Step 4: Simplify right side
    120,802.68x = 12,176,863,240.93
  5. Step 5: Solve for x
    x = 12,176,863,240.93/120,802.68
  6. Step 6: Final answer
    x = 100,799.61

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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.