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Finding the Fourth Proportional to 108,494.10, 149,621.94 and 74,442.51

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Solution

The fourth proportional to 108,494.10, 149,621.94 and 74,442.51 is: 102,662.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,494.10 : 149,621.94 = 74,442.51 : x
  2. Step 2: Convert to fraction form
    108,494.10/149,621.94 = 74,442.51/x
  3. Step 3: Cross multiply
    108,494.10x = 149,621.94 × 74,442.51
  4. Step 4: Simplify right side
    108,494.10x = 11,138,232,764.67
  5. Step 5: Solve for x
    x = 11,138,232,764.67/108,494.10
  6. Step 6: Final answer
    x = 102,662.11

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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.