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Finding the Fourth Proportional to 156,961.56, 216,605.84 and 85,341.60

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Solution

The fourth proportional to 156,961.56, 216,605.84 and 85,341.60 is: 117,770.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,961.56 : 216,605.84 = 85,341.60 : x
  2. Step 2: Convert to fraction form
    156,961.56/216,605.84 = 85,341.60/x
  3. Step 3: Cross multiply
    156,961.56x = 216,605.84 × 85,341.60
  4. Step 4: Simplify right side
    156,961.56x = 18,485,488,954.94
  5. Step 5: Solve for x
    x = 18,485,488,954.94/156,961.56
  6. Step 6: Final answer
    x = 117,770.80

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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.