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Finding the Fourth Proportional to 120,626, 166,462.72 and 66,911.12

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Solution

The fourth proportional to 120,626, 166,462.72 and 66,911.12 is: 92,336.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,626 : 166,462.72 = 66,911.12 : x
  2. Step 2: Convert to fraction form
    120,626/166,462.72 = 66,911.12/x
  3. Step 3: Cross multiply
    120,626x = 166,462.72 × 66,911.12
  4. Step 4: Simplify right side
    120,626x = 11,138,207,033.45
  5. Step 5: Solve for x
    x = 11,138,207,033.45/120,626
  6. Step 6: Final answer
    x = 92,336.70

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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.