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Finding the Fourth Proportional to 68,405.87, 94,390.46 and 38,187

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Solution

The fourth proportional to 68,405.87, 94,390.46 and 38,187 is: 52,692.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,405.87 : 94,390.46 = 38,187 : x
  2. Step 2: Convert to fraction form
    68,405.87/94,390.46 = 38,187/x
  3. Step 3: Cross multiply
    68,405.87x = 94,390.46 × 38,187
  4. Step 4: Simplify right side
    68,405.87x = 3,604,488,305.09
  5. Step 5: Solve for x
    x = 3,604,488,305.09/68,405.87
  6. Step 6: Final answer
    x = 52,692.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.