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Finding the Fourth Proportional to 68,682.86, 103,039.10 and 21,297.00

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Solution

The fourth proportional to 68,682.86, 103,039.10 and 21,297.00 is: 31,950.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,682.86 : 103,039.10 = 21,297.00 : x
  2. Step 2: Convert to fraction form
    68,682.86/103,039.10 = 21,297.00/x
  3. Step 3: Cross multiply
    68,682.86x = 103,039.10 × 21,297.00
  4. Step 4: Simplify right side
    68,682.86x = 2,194,423,793.05
  5. Step 5: Solve for x
    x = 2,194,423,793.05/68,682.86
  6. Step 6: Final answer
    x = 31,950.09

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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.