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Finding the Fourth Proportional to 68,857.80, 103,301.10 and 22,115.40

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Solution

The fourth proportional to 68,857.80, 103,301.10 and 22,115.40 is: 33,177.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,857.80 : 103,301.10 = 22,115.40 : x
  2. Step 2: Convert to fraction form
    68,857.80/103,301.10 = 22,115.40/x
  3. Step 3: Cross multiply
    68,857.80x = 103,301.10 × 22,115.40
  4. Step 4: Simplify right side
    68,857.80x = 2,284,545,146.94
  5. Step 5: Solve for x
    x = 2,284,545,146.94/68,857.80
  6. Step 6: Final answer
    x = 33,177.72

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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.