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Finding the Fourth Proportional to 93,453.70, 128,908.64 and 66,604.90

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Solution

The fourth proportional to 93,453.70, 128,908.64 and 66,604.90 is: 91,873.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,453.70 : 128,908.64 = 66,604.90 : x
  2. Step 2: Convert to fraction form
    93,453.70/128,908.64 = 66,604.90/x
  3. Step 3: Cross multiply
    93,453.70x = 128,908.64 × 66,604.90
  4. Step 4: Simplify right side
    93,453.70x = 8,585,947,076.34
  5. Step 5: Solve for x
    x = 8,585,947,076.34/93,453.70
  6. Step 6: Final answer
    x = 91,873.81

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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.