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Finding the Fourth Proportional to 108,267.88, 149,439.86 and 74,281.90

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Solution

The fourth proportional to 108,267.88, 149,439.86 and 74,281.90 is: 102,529.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,267.88 : 149,439.86 = 74,281.90 : x
  2. Step 2: Convert to fraction form
    108,267.88/149,439.86 = 74,281.90/x
  3. Step 3: Cross multiply
    108,267.88x = 149,439.86 × 74,281.90
  4. Step 4: Simplify right side
    108,267.88x = 11,100,676,736.53
  5. Step 5: Solve for x
    x = 11,100,676,736.53/108,267.88
  6. Step 6: Final answer
    x = 102,529.73

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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.