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Finding the Fourth Proportional to 157,311.53, 217,093.26 and 85,691.40

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Solution

The fourth proportional to 157,311.53, 217,093.26 and 85,691.40 is: 118,255.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,311.53 : 217,093.26 = 85,691.40 : x
  2. Step 2: Convert to fraction form
    157,311.53/217,093.26 = 85,691.40/x
  3. Step 3: Cross multiply
    157,311.53x = 217,093.26 × 85,691.40
  4. Step 4: Simplify right side
    157,311.53x = 18,603,025,379.96
  5. Step 5: Solve for x
    x = 18,603,025,379.96/157,311.53
  6. Step 6: Final answer
    x = 118,255.96

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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.