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Finding the Fourth Proportional to 82,011.60, 122,844.60 and 68,187.60

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Solution

The fourth proportional to 82,011.60, 122,844.60 and 68,187.60 is: 102,137.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,011.60 : 122,844.60 = 68,187.60 : x
  2. Step 2: Convert to fraction form
    82,011.60/122,844.60 = 68,187.60/x
  3. Step 3: Cross multiply
    82,011.60x = 122,844.60 × 68,187.60
  4. Step 4: Simplify right side
    82,011.60x = 8,376,478,446.96
  5. Step 5: Solve for x
    x = 8,376,478,446.96/82,011.60
  6. Step 6: Final answer
    x = 102,137.73

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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.