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Finding the Fourth Proportional to 108,691.40, 162,964.20 and 49,496.60

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Solution

The fourth proportional to 108,691.40, 162,964.20 and 49,496.60 is: 74,211.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,691.40 : 162,964.20 = 49,496.60 : x
  2. Step 2: Convert to fraction form
    108,691.40/162,964.20 = 49,496.60/x
  3. Step 3: Cross multiply
    108,691.40x = 162,964.20 × 49,496.60
  4. Step 4: Simplify right side
    108,691.40x = 8,066,173,821.72
  5. Step 5: Solve for x
    x = 8,066,173,821.72/108,691.40
  6. Step 6: Final answer
    x = 74,211.70

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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.