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Finding the Fourth Proportional to 54,120.72, 81,188.72 and 16,683.84

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Solution

The fourth proportional to 54,120.72, 81,188.72 and 16,683.84 is: 25,028.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,120.72 : 81,188.72 = 16,683.84 : x
  2. Step 2: Convert to fraction form
    54,120.72/81,188.72 = 16,683.84/x
  3. Step 3: Cross multiply
    54,120.72x = 81,188.72 × 16,683.84
  4. Step 4: Simplify right side
    54,120.72x = 1,354,539,614.28
  5. Step 5: Solve for x
    x = 1,354,539,614.28/54,120.72
  6. Step 6: Final answer
    x = 25,028.12

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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.