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Finding the Fourth Proportional to 82,608.40, 123,912.60 and 81,296.20

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Solution

The fourth proportional to 82,608.40, 123,912.60 and 81,296.20 is: 121,944.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,608.40 : 123,912.60 = 81,296.20 : x
  2. Step 2: Convert to fraction form
    82,608.40/123,912.60 = 81,296.20/x
  3. Step 3: Cross multiply
    82,608.40x = 123,912.60 × 81,296.20
  4. Step 4: Simplify right side
    82,608.40x = 10,073,623,512.12
  5. Step 5: Solve for x
    x = 10,073,623,512.12/82,608.40
  6. Step 6: Final answer
    x = 121,944.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.