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Finding the Fourth Proportional to 93,169.80, 139,754.70 and 91,857.60

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Solution

The fourth proportional to 93,169.80, 139,754.70 and 91,857.60 is: 137,786.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,169.80 : 139,754.70 = 91,857.60 : x
  2. Step 2: Convert to fraction form
    93,169.80/139,754.70 = 91,857.60/x
  3. Step 3: Cross multiply
    93,169.80x = 139,754.70 × 91,857.60
  4. Step 4: Simplify right side
    93,169.80x = 12,837,531,330.72
  5. Step 5: Solve for x
    x = 12,837,531,330.72/93,169.80
  6. Step 6: Final answer
    x = 137,786.40

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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.