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Finding the Fourth Proportional to 156,069.40, 215,375.34 and 84,450.64

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Solution

The fourth proportional to 156,069.40, 215,375.34 and 84,450.64 is: 116,541.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,069.40 : 215,375.34 = 84,450.64 : x
  2. Step 2: Convert to fraction form
    156,069.40/215,375.34 = 84,450.64/x
  3. Step 3: Cross multiply
    156,069.40x = 215,375.34 × 84,450.64
  4. Step 4: Simplify right side
    156,069.40x = 18,188,585,303.22
  5. Step 5: Solve for x
    x = 18,188,585,303.22/156,069.40
  6. Step 6: Final answer
    x = 116,541.65

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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.