Home / 120,949.20-166,909-67,239.12

Finding the Fourth Proportional to 120,949.20, 166,909 and 67,239.12

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Solution

The fourth proportional to 120,949.20, 166,909 and 67,239.12 is: 92,789.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,949.20 : 166,909 = 67,239.12 : x
  2. Step 2: Convert to fraction form
    120,949.20/166,909 = 67,239.12/x
  3. Step 3: Cross multiply
    120,949.20x = 166,909 × 67,239.12
  4. Step 4: Simplify right side
    120,949.20x = 11,222,814,280.08
  5. Step 5: Solve for x
    x = 11,222,814,280.08/120,949.20
  6. Step 6: Final answer
    x = 92,789.49

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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.