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Finding the Fourth Proportional to 68,229, 102,347.15 and 21,485.52

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Solution

The fourth proportional to 68,229, 102,347.15 and 21,485.52 is: 32,229.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,229 : 102,347.15 = 21,485.52 : x
  2. Step 2: Convert to fraction form
    68,229/102,347.15 = 21,485.52/x
  3. Step 3: Cross multiply
    68,229x = 102,347.15 × 21,485.52
  4. Step 4: Simplify right side
    68,229x = 2,198,981,630.84
  5. Step 5: Solve for x
    x = 2,198,981,630.84/68,229
  6. Step 6: Final answer
    x = 32,229.43

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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.