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Finding the Fourth Proportional to 87,515.99, 120,736.11 and 64,910.60

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Solution

The fourth proportional to 87,515.99, 120,736.11 and 64,910.60 is: 89,549.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,515.99 : 120,736.11 = 64,910.60 : x
  2. Step 2: Convert to fraction form
    87,515.99/120,736.11 = 64,910.60/x
  3. Step 3: Cross multiply
    87,515.99x = 120,736.11 × 64,910.60
  4. Step 4: Simplify right side
    87,515.99x = 7,837,053,341.77
  5. Step 5: Solve for x
    x = 7,837,053,341.77/87,515.99
  6. Step 6: Final answer
    x = 89,549.96

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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.