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Finding the Fourth Proportional to 108,930.80, 163,396.20 and 67,458.80

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Solution

The fourth proportional to 108,930.80, 163,396.20 and 67,458.80 is: 101,188.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,930.80 : 163,396.20 = 67,458.80 : x
  2. Step 2: Convert to fraction form
    108,930.80/163,396.20 = 67,458.80/x
  3. Step 3: Cross multiply
    108,930.80x = 163,396.20 × 67,458.80
  4. Step 4: Simplify right side
    108,930.80x = 11,022,511,576.56
  5. Step 5: Solve for x
    x = 11,022,511,576.56/108,930.80
  6. Step 6: Final answer
    x = 101,188.20

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1.5x scale

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.