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Finding the Fourth Proportional to 68,839.42, 103,261.67 and 18,923.42

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Solution

The fourth proportional to 68,839.42, 103,261.67 and 18,923.42 is: 28,385.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,839.42 : 103,261.67 = 18,923.42 : x
  2. Step 2: Convert to fraction form
    68,839.42/103,261.67 = 18,923.42/x
  3. Step 3: Cross multiply
    68,839.42x = 103,261.67 × 18,923.42
  4. Step 4: Simplify right side
    68,839.42x = 1,954,064,185.81
  5. Step 5: Solve for x
    x = 1,954,064,185.81/68,839.42
  6. Step 6: Final answer
    x = 28,385.83

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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.