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Finding the Fourth Proportional to 156,647.85, 216,175.13 and 85,027.86

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Solution

The fourth proportional to 156,647.85, 216,175.13 and 85,027.86 is: 117,339.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,647.85 : 216,175.13 = 85,027.86 : x
  2. Step 2: Convert to fraction form
    156,647.85/216,175.13 = 85,027.86/x
  3. Step 3: Cross multiply
    156,647.85x = 216,175.13 × 85,027.86
  4. Step 4: Simplify right side
    156,647.85x = 18,380,908,263.98
  5. Step 5: Solve for x
    x = 18,380,908,263.98/156,647.85
  6. Step 6: Final answer
    x = 117,339.04

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1.5x scale

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.