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Finding the Fourth Proportional to 68,406.76, 102,628.38 and 21,660.52

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Solution

The fourth proportional to 68,406.76, 102,628.38 and 21,660.52 is: 32,496.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,406.76 : 102,628.38 = 21,660.52 : x
  2. Step 2: Convert to fraction form
    68,406.76/102,628.38 = 21,660.52/x
  3. Step 3: Cross multiply
    68,406.76x = 102,628.38 × 21,660.52
  4. Step 4: Simplify right side
    68,406.76x = 2,222,984,077.56
  5. Step 5: Solve for x
    x = 2,222,984,077.56/68,406.76
  6. Step 6: Final answer
    x = 32,496.56

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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.