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Finding the Fourth Proportional to 55,008.80, 82,513.20 and 18,072.80

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Solution

The fourth proportional to 55,008.80, 82,513.20 and 18,072.80 is: 27,109.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,008.80 : 82,513.20 = 18,072.80 : x
  2. Step 2: Convert to fraction form
    55,008.80/82,513.20 = 18,072.80/x
  3. Step 3: Cross multiply
    55,008.80x = 82,513.20 × 18,072.80
  4. Step 4: Simplify right side
    55,008.80x = 1,491,244,560.96
  5. Step 5: Solve for x
    x = 1,491,244,560.96/55,008.80
  6. Step 6: Final answer
    x = 27,109.20

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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.