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Finding the Fourth Proportional to 68,304.46, 102,468.44 and 20,918.38

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Solution

The fourth proportional to 68,304.46, 102,468.44 and 20,918.38 is: 31,381.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,304.46 : 102,468.44 = 20,918.38 : x
  2. Step 2: Convert to fraction form
    68,304.46/102,468.44 = 20,918.38/x
  3. Step 3: Cross multiply
    68,304.46x = 102,468.44 × 20,918.38
  4. Step 4: Simplify right side
    68,304.46x = 2,143,473,765.93
  5. Step 5: Solve for x
    x = 2,143,473,765.93/68,304.46
  6. Step 6: Final answer
    x = 31,381.17

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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.