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Finding the Fourth Proportional to 120,640.68, 166,491.78 and 69,662.88

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Solution

The fourth proportional to 120,640.68, 166,491.78 and 69,662.88 is: 96,139.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,640.68 : 166,491.78 = 69,662.88 : x
  2. Step 2: Convert to fraction form
    120,640.68/166,491.78 = 69,662.88/x
  3. Step 3: Cross multiply
    120,640.68x = 166,491.78 × 69,662.88
  4. Step 4: Simplify right side
    120,640.68x = 11,598,296,891.13
  5. Step 5: Solve for x
    x = 11,598,296,891.13/120,640.68
  6. Step 6: Final answer
    x = 96,139.19

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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.