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Finding the Fourth Proportional to 68,796.30, 103,176.90 and 21,402.12

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Solution

The fourth proportional to 68,796.30, 103,176.90 and 21,402.12 is: 32,097.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,796.30 : 103,176.90 = 21,402.12 : x
  2. Step 2: Convert to fraction form
    68,796.30/103,176.90 = 21,402.12/x
  3. Step 3: Cross multiply
    68,796.30x = 103,176.90 × 21,402.12
  4. Step 4: Simplify right side
    68,796.30x = 2,208,204,395.03
  5. Step 5: Solve for x
    x = 2,208,204,395.03/68,796.30
  6. Step 6: Final answer
    x = 32,097.72

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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.