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Finding the Fourth Proportional to 68,910.64, 103,356.54 and 18,983.56

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Solution

The fourth proportional to 68,910.64, 103,356.54 and 18,983.56 is: 28,472.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,910.64 : 103,356.54 = 18,983.56 : x
  2. Step 2: Convert to fraction form
    68,910.64/103,356.54 = 18,983.56/x
  3. Step 3: Cross multiply
    68,910.64x = 103,356.54 × 18,983.56
  4. Step 4: Simplify right side
    68,910.64x = 1,962,074,820.09
  5. Step 5: Solve for x
    x = 1,962,074,820.09/68,910.64
  6. Step 6: Final answer
    x = 28,472.74

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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.