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Finding the Fourth Proportional to 68,835.87, 103,256.82 and 18,920.88

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Solution

The fourth proportional to 68,835.87, 103,256.82 and 18,920.88 is: 28,382.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,835.87 : 103,256.82 = 18,920.88 : x
  2. Step 2: Convert to fraction form
    68,835.87/103,256.82 = 18,920.88/x
  3. Step 3: Cross multiply
    68,835.87x = 103,256.82 × 18,920.88
  4. Step 4: Simplify right side
    68,835.87x = 1,953,709,900.40
  5. Step 5: Solve for x
    x = 1,953,709,900.40/68,835.87
  6. Step 6: Final answer
    x = 28,382.15

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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.