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Finding the Fourth Proportional to 68,657.82, 103,003.17 and 28,654.56

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Solution

The fourth proportional to 68,657.82, 103,003.17 and 28,654.56 is: 42,988.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,657.82 : 103,003.17 = 28,654.56 : x
  2. Step 2: Convert to fraction form
    68,657.82/103,003.17 = 28,654.56/x
  3. Step 3: Cross multiply
    68,657.82x = 103,003.17 × 28,654.56
  4. Step 4: Simplify right side
    68,657.82x = 2,951,510,514.96
  5. Step 5: Solve for x
    x = 2,951,510,514.96/68,657.82
  6. Step 6: Final answer
    x = 42,988.70

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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.