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Finding the Fourth Proportional to 54,136.28, 81,220.80 and 38,371.80

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Solution

The fourth proportional to 54,136.28, 81,220.80 and 38,371.80 is: 57,569.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,136.28 : 81,220.80 = 38,371.80 : x
  2. Step 2: Convert to fraction form
    54,136.28/81,220.80 = 38,371.80/x
  3. Step 3: Cross multiply
    54,136.28x = 81,220.80 × 38,371.80
  4. Step 4: Simplify right side
    54,136.28x = 3,116,588,293.44
  5. Step 5: Solve for x
    x = 3,116,588,293.44/54,136.28
  6. Step 6: Final answer
    x = 57,569.31

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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.