Home / 81,786.70-122,680.05-68,664.70

Finding the Fourth Proportional to 81,786.70, 122,680.05 and 68,664.70

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Solution

The fourth proportional to 81,786.70, 122,680.05 and 68,664.70 is: 102,997.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,786.70 : 122,680.05 = 68,664.70 : x
  2. Step 2: Convert to fraction form
    81,786.70/122,680.05 = 68,664.70/x
  3. Step 3: Cross multiply
    81,786.70x = 122,680.05 × 68,664.70
  4. Step 4: Simplify right side
    81,786.70x = 8,423,788,829.24
  5. Step 5: Solve for x
    x = 8,423,788,829.24/81,786.70
  6. Step 6: Final answer
    x = 102,997.05

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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.