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Finding the Fourth Proportional to 68,359.74, 102,538.92 and 21,612.60

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Solution

The fourth proportional to 68,359.74, 102,538.92 and 21,612.60 is: 32,418.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,359.74 : 102,538.92 = 21,612.60 : x
  2. Step 2: Convert to fraction form
    68,359.74/102,538.92 = 21,612.60/x
  3. Step 3: Cross multiply
    68,359.74x = 102,538.92 × 21,612.60
  4. Step 4: Simplify right side
    68,359.74x = 2,216,132,662.39
  5. Step 5: Solve for x
    x = 2,216,132,662.39/68,359.74
  6. Step 6: Final answer
    x = 32,418.68

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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.