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Finding the Fourth Proportional to 93,519.94, 128,785.69 and 81,249.67

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Solution

The fourth proportional to 93,519.94, 128,785.69 and 81,249.67 is: 111,888.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,519.94 : 128,785.69 = 81,249.67 : x
  2. Step 2: Convert to fraction form
    93,519.94/128,785.69 = 81,249.67/x
  3. Step 3: Cross multiply
    93,519.94x = 128,785.69 × 81,249.67
  4. Step 4: Simplify right side
    93,519.94x = 10,463,795,669.60
  5. Step 5: Solve for x
    x = 10,463,795,669.60/93,519.94
  6. Step 6: Final answer
    x = 111,888.39

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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.