Home / 68,187.89-102,297.32-20,807.21

Finding the Fourth Proportional to 68,187.89, 102,297.32 and 20,807.21

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Solution

The fourth proportional to 68,187.89, 102,297.32 and 20,807.21 is: 31,215.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,187.89 : 102,297.32 = 20,807.21 : x
  2. Step 2: Convert to fraction form
    68,187.89/102,297.32 = 20,807.21/x
  3. Step 3: Cross multiply
    68,187.89x = 102,297.32 × 20,807.21
  4. Step 4: Simplify right side
    68,187.89x = 2,128,522,049.41
  5. Step 5: Solve for x
    x = 2,128,522,049.41/68,187.89
  6. Step 6: Final answer
    x = 31,215.54

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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.