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Finding the Fourth Proportional to 120,628.72, 166,464.41 and 69,639.73

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Solution

The fourth proportional to 120,628.72, 166,464.41 and 69,639.73 is: 96,100.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,628.72 : 166,464.41 = 69,639.73 : x
  2. Step 2: Convert to fraction form
    120,628.72/166,464.41 = 69,639.73/x
  3. Step 3: Cross multiply
    120,628.72x = 166,464.41 × 69,639.73
  4. Step 4: Simplify right side
    120,628.72x = 11,592,536,324.95
  5. Step 5: Solve for x
    x = 11,592,536,324.95/120,628.72
  6. Step 6: Final answer
    x = 96,100.97

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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.