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Finding the Fourth Proportional to 68,221.60, 102,262 and 36,990.88

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Solution

The fourth proportional to 68,221.60, 102,262 and 36,990.88 is: 55,448.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,221.60 : 102,262 = 36,990.88 : x
  2. Step 2: Convert to fraction form
    68,221.60/102,262 = 36,990.88/x
  3. Step 3: Cross multiply
    68,221.60x = 102,262 × 36,990.88
  4. Step 4: Simplify right side
    68,221.60x = 3,782,761,370.56
  5. Step 5: Solve for x
    x = 3,782,761,370.56/68,221.60
  6. Step 6: Final answer
    x = 55,448.15

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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.