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Finding the Fourth Proportional to 120,991.40, 166,967.56 and 67,273.20

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Solution

The fourth proportional to 120,991.40, 166,967.56 and 67,273.20 is: 92,836.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,991.40 : 166,967.56 = 67,273.20 : x
  2. Step 2: Convert to fraction form
    120,991.40/166,967.56 = 67,273.20/x
  3. Step 3: Cross multiply
    120,991.40x = 166,967.56 × 67,273.20
  4. Step 4: Simplify right side
    120,991.40x = 11,232,442,057.39
  5. Step 5: Solve for x
    x = 11,232,442,057.39/120,991.40
  6. Step 6: Final answer
    x = 92,836.70

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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.