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Finding the Fourth Proportional to 82,028.70, 123,043.05 and 68,906.70

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Solution

The fourth proportional to 82,028.70, 123,043.05 and 68,906.70 is: 103,360.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,028.70 : 123,043.05 = 68,906.70 : x
  2. Step 2: Convert to fraction form
    82,028.70/123,043.05 = 68,906.70/x
  3. Step 3: Cross multiply
    82,028.70x = 123,043.05 × 68,906.70
  4. Step 4: Simplify right side
    82,028.70x = 8,478,490,533.44
  5. Step 5: Solve for x
    x = 8,478,490,533.44/82,028.70
  6. Step 6: Final answer
    x = 103,360.05

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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.