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Finding the Fourth Proportional to 68,486.79, 102,753.26 and 43,156.89

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Solution

The fourth proportional to 68,486.79, 102,753.26 and 43,156.89 is: 64,749.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,486.79 : 102,753.26 = 43,156.89 : x
  2. Step 2: Convert to fraction form
    68,486.79/102,753.26 = 43,156.89/x
  3. Step 3: Cross multiply
    68,486.79x = 102,753.26 × 43,156.89
  4. Step 4: Simplify right side
    68,486.79x = 4,434,511,138.96
  5. Step 5: Solve for x
    x = 4,434,511,138.96/68,486.79
  6. Step 6: Final answer
    x = 64,749.88

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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.