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Finding the Fourth Proportional to 68,168.88, 102,268.68 and 20,788.16

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Solution

The fourth proportional to 68,168.88, 102,268.68 and 20,788.16 is: 31,186.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,168.88 : 102,268.68 = 20,788.16 : x
  2. Step 2: Convert to fraction form
    68,168.88/102,268.68 = 20,788.16/x
  3. Step 3: Cross multiply
    68,168.88x = 102,268.68 × 20,788.16
  4. Step 4: Simplify right side
    68,168.88x = 2,125,977,682.83
  5. Step 5: Solve for x
    x = 2,125,977,682.83/68,168.88
  6. Step 6: Final answer
    x = 31,186.92

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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.