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Finding the Fourth Proportional to 64,813.96, 89,447.94 and 36,135.56

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Solution

The fourth proportional to 64,813.96, 89,447.94 and 36,135.56 is: 49,869.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,813.96 : 89,447.94 = 36,135.56 : x
  2. Step 2: Convert to fraction form
    64,813.96/89,447.94 = 36,135.56/x
  3. Step 3: Cross multiply
    64,813.96x = 89,447.94 × 36,135.56
  4. Step 4: Simplify right side
    64,813.96x = 3,232,251,402.75
  5. Step 5: Solve for x
    x = 3,232,251,402.75/64,813.96
  6. Step 6: Final answer
    x = 49,869.68

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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.