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Finding the Fourth Proportional to 156,648.60, 216,178.90 and 85,028.44

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Solution

The fourth proportional to 156,648.60, 216,178.90 and 85,028.44 is: 117,341.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,648.60 : 216,178.90 = 85,028.44 : x
  2. Step 2: Convert to fraction form
    156,648.60/216,178.90 = 85,028.44/x
  3. Step 3: Cross multiply
    156,648.60x = 216,178.90 × 85,028.44
  4. Step 4: Simplify right side
    156,648.60x = 18,381,354,627.92
  5. Step 5: Solve for x
    x = 18,381,354,627.92/156,648.60
  6. Step 6: Final answer
    x = 117,341.33

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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.