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Finding the Fourth Proportional to 64,768.91, 97,156.83 and 20,399.12

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Solution

The fourth proportional to 64,768.91, 97,156.83 and 20,399.12 is: 30,599.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,768.91 : 97,156.83 = 20,399.12 : x
  2. Step 2: Convert to fraction form
    64,768.91/97,156.83 = 20,399.12/x
  3. Step 3: Cross multiply
    64,768.91x = 97,156.83 × 20,399.12
  4. Step 4: Simplify right side
    64,768.91x = 1,981,913,833.99
  5. Step 5: Solve for x
    x = 1,981,913,833.99/64,768.91
  6. Step 6: Final answer
    x = 30,599.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.