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Finding the Fourth Proportional to 120,911.18, 166,863.09 and 67,197.09

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Solution

The fourth proportional to 120,911.18, 166,863.09 and 67,197.09 is: 92,735.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,911.18 : 166,863.09 = 67,197.09 : x
  2. Step 2: Convert to fraction form
    120,911.18/166,863.09 = 67,197.09/x
  3. Step 3: Cross multiply
    120,911.18x = 166,863.09 × 67,197.09
  4. Step 4: Simplify right side
    120,911.18x = 11,212,714,576.15
  5. Step 5: Solve for x
    x = 11,212,714,576.15/120,911.18
  6. Step 6: Final answer
    x = 92,735.13

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1.5x scale

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.