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Finding the Fourth Proportional to 120,059.02, 165,691.42 and 66,354.52

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Solution

The fourth proportional to 120,059.02, 165,691.42 and 66,354.52 is: 91,574.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,059.02 : 165,691.42 = 66,354.52 : x
  2. Step 2: Convert to fraction form
    120,059.02/165,691.42 = 66,354.52/x
  3. Step 3: Cross multiply
    120,059.02x = 165,691.42 × 66,354.52
  4. Step 4: Simplify right side
    120,059.02x = 10,994,373,647.88
  5. Step 5: Solve for x
    x = 10,994,373,647.88/120,059.02
  6. Step 6: Final answer
    x = 91,574.74

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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.