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Finding the Fourth Proportional to 68,382.80, 102,582.20 and 21,640.40

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Solution

The fourth proportional to 68,382.80, 102,582.20 and 21,640.40 is: 32,463.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,382.80 : 102,582.20 = 21,640.40 : x
  2. Step 2: Convert to fraction form
    68,382.80/102,582.20 = 21,640.40/x
  3. Step 3: Cross multiply
    68,382.80x = 102,582.20 × 21,640.40
  4. Step 4: Simplify right side
    68,382.80x = 2,219,919,840.88
  5. Step 5: Solve for x
    x = 2,219,919,840.88/68,382.80
  6. Step 6: Final answer
    x = 32,463.13

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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.