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Finding the Fourth Proportional to 120,906.78, 166,851.70 and 67,191.63

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Solution

The fourth proportional to 120,906.78, 166,851.70 and 67,191.63 is: 92,724.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,906.78 : 166,851.70 = 67,191.63 : x
  2. Step 2: Convert to fraction form
    120,906.78/166,851.70 = 67,191.63/x
  3. Step 3: Cross multiply
    120,906.78x = 166,851.70 × 67,191.63
  4. Step 4: Simplify right side
    120,906.78x = 11,211,036,897.60
  5. Step 5: Solve for x
    x = 11,211,036,897.60/120,906.78
  6. Step 6: Final answer
    x = 92,724.64

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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.