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Finding the Fourth Proportional to 66,491.16, 91,763.28 and 37,819.80

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Solution

The fourth proportional to 66,491.16, 91,763.28 and 37,819.80 is: 52,194.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,491.16 : 91,763.28 = 37,819.80 : x
  2. Step 2: Convert to fraction form
    66,491.16/91,763.28 = 37,819.80/x
  3. Step 3: Cross multiply
    66,491.16x = 91,763.28 × 37,819.80
  4. Step 4: Simplify right side
    66,491.16x = 3,470,468,896.94
  5. Step 5: Solve for x
    x = 3,470,468,896.94/66,491.16
  6. Step 6: Final answer
    x = 52,194.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.