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Finding the Fourth Proportional to 68,231.53, 102,362.87 and 20,853.37

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Solution

The fourth proportional to 68,231.53, 102,362.87 and 20,853.37 is: 31,284.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,231.53 : 102,362.87 = 20,853.37 : x
  2. Step 2: Convert to fraction form
    68,231.53/102,362.87 = 20,853.37/x
  3. Step 3: Cross multiply
    68,231.53x = 102,362.87 × 20,853.37
  4. Step 4: Simplify right side
    68,231.53x = 2,134,610,598.60
  5. Step 5: Solve for x
    x = 2,134,610,598.60/68,231.53
  6. Step 6: Final answer
    x = 31,284.81

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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.