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Finding the Fourth Proportional to 105,904.67, 158,893.45 and 66,415.55

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Solution

The fourth proportional to 105,904.67, 158,893.45 and 66,415.55 is: 99,646.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,904.67 : 158,893.45 = 66,415.55 : x
  2. Step 2: Convert to fraction form
    105,904.67/158,893.45 = 66,415.55/x
  3. Step 3: Cross multiply
    105,904.67x = 158,893.45 × 66,415.55
  4. Step 4: Simplify right side
    105,904.67x = 10,552,994,912.64
  5. Step 5: Solve for x
    x = 10,552,994,912.64/105,904.67
  6. Step 6: Final answer
    x = 99,646.18

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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.