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Finding the Fourth Proportional to 68,517.80, 102,666.30 and 38,847.40

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Solution

The fourth proportional to 68,517.80, 102,666.30 and 38,847.40 is: 58,208.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,517.80 : 102,666.30 = 38,847.40 : x
  2. Step 2: Convert to fraction form
    68,517.80/102,666.30 = 38,847.40/x
  3. Step 3: Cross multiply
    68,517.80x = 102,666.30 × 38,847.40
  4. Step 4: Simplify right side
    68,517.80x = 3,988,318,822.62
  5. Step 5: Solve for x
    x = 3,988,318,822.62/68,517.80
  6. Step 6: Final answer
    x = 58,208.51

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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.