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Finding the Fourth Proportional to 93,090.26, 139,509.48 and 66,736.82

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Solution

The fourth proportional to 93,090.26, 139,509.48 and 66,736.82 is: 100,014.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,090.26 : 139,509.48 = 66,736.82 : x
  2. Step 2: Convert to fraction form
    93,090.26/139,509.48 = 66,736.82/x
  3. Step 3: Cross multiply
    93,090.26x = 139,509.48 × 66,736.82
  4. Step 4: Simplify right side
    93,090.26x = 9,310,419,055.05
  5. Step 5: Solve for x
    x = 9,310,419,055.05/93,090.26
  6. Step 6: Final answer
    x = 100,014.96

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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.