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Finding the Fourth Proportional to 110,978.10, 166,467.15 and 75,548.70

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Solution

The fourth proportional to 110,978.10, 166,467.15 and 75,548.70 is: 113,323.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,978.10 : 166,467.15 = 75,548.70 : x
  2. Step 2: Convert to fraction form
    110,978.10/166,467.15 = 75,548.70/x
  3. Step 3: Cross multiply
    110,978.10x = 166,467.15 × 75,548.70
  4. Step 4: Simplify right side
    110,978.10x = 12,576,376,775.21
  5. Step 5: Solve for x
    x = 12,576,376,775.21/110,978.10
  6. Step 6: Final answer
    x = 113,323.05

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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.