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Finding the Fourth Proportional to 156,645.39, 216,164.82 and 85,023.87

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Solution

The fourth proportional to 156,645.39, 216,164.82 and 85,023.87 is: 117,329.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,645.39 : 216,164.82 = 85,023.87 : x
  2. Step 2: Convert to fraction form
    156,645.39/216,164.82 = 85,023.87/x
  3. Step 3: Cross multiply
    156,645.39x = 216,164.82 × 85,023.87
  4. Step 4: Simplify right side
    156,645.39x = 18,379,169,554.25
  5. Step 5: Solve for x
    x = 18,379,169,554.25/156,645.39
  6. Step 6: Final answer
    x = 117,329.78

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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.