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Finding the Fourth Proportional to 120,866.42, 166,661.20 and 82,632.20

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Solution

The fourth proportional to 120,866.42, 166,661.20 and 82,632.20 is: 113,940.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,866.42 : 166,661.20 = 82,632.20 : x
  2. Step 2: Convert to fraction form
    120,866.42/166,661.20 = 82,632.20/x
  3. Step 3: Cross multiply
    120,866.42x = 166,661.20 × 82,632.20
  4. Step 4: Simplify right side
    120,866.42x = 13,771,581,610.64
  5. Step 5: Solve for x
    x = 13,771,581,610.64/120,866.42
  6. Step 6: Final answer
    x = 113,940.51

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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.