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Finding the Fourth Proportional to 68,361.72, 102,541.94 and 21,614.60

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Solution

The fourth proportional to 68,361.72, 102,541.94 and 21,614.60 is: 32,421.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,361.72 : 102,541.94 = 21,614.60 : x
  2. Step 2: Convert to fraction form
    68,361.72/102,541.94 = 21,614.60/x
  3. Step 3: Cross multiply
    68,361.72x = 102,541.94 × 21,614.60
  4. Step 4: Simplify right side
    68,361.72x = 2,216,403,016.32
  5. Step 5: Solve for x
    x = 2,216,403,016.32/68,361.72
  6. Step 6: Final answer
    x = 32,421.70

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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.