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Finding the Fourth Proportional to 120,930.30, 166,815.70 and 72,519.33

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Solution

The fourth proportional to 120,930.30, 166,815.70 and 72,519.33 is: 100,035.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,930.30 : 166,815.70 = 72,519.33 : x
  2. Step 2: Convert to fraction form
    120,930.30/166,815.70 = 72,519.33/x
  3. Step 3: Cross multiply
    120,930.30x = 166,815.70 × 72,519.33
  4. Step 4: Simplify right side
    120,930.30x = 12,097,362,797.48
  5. Step 5: Solve for x
    x = 12,097,362,797.48/120,930.30
  6. Step 6: Final answer
    x = 100,035.83

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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.