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Finding the Fourth Proportional to 77,571.27, 116,354.59 and 21,414.80

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Solution

The fourth proportional to 77,571.27, 116,354.59 and 21,414.80 is: 32,121.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,571.27 : 116,354.59 = 21,414.80 : x
  2. Step 2: Convert to fraction form
    77,571.27/116,354.59 = 21,414.80/x
  3. Step 3: Cross multiply
    77,571.27x = 116,354.59 × 21,414.80
  4. Step 4: Simplify right side
    77,571.27x = 2,491,710,511.28
  5. Step 5: Solve for x
    x = 2,491,710,511.28/77,571.27
  6. Step 6: Final answer
    x = 32,121.56

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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.