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Finding the Fourth Proportional to 36,139.80, 54,217.80 and 13,951.20

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Solution

The fourth proportional to 36,139.80, 54,217.80 and 13,951.20 is: 20,929.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,139.80 : 54,217.80 = 13,951.20 : x
  2. Step 2: Convert to fraction form
    36,139.80/54,217.80 = 13,951.20/x
  3. Step 3: Cross multiply
    36,139.80x = 54,217.80 × 13,951.20
  4. Step 4: Simplify right side
    36,139.80x = 756,403,371.36
  5. Step 5: Solve for x
    x = 756,403,371.36/36,139.80
  6. Step 6: Final answer
    x = 20,929.93

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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.