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Finding the Fourth Proportional to 68,354.42, 102,542.56 and 28,911.87

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Solution

The fourth proportional to 68,354.42, 102,542.56 and 28,911.87 is: 43,372.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,354.42 : 102,542.56 = 28,911.87 : x
  2. Step 2: Convert to fraction form
    68,354.42/102,542.56 = 28,911.87/x
  3. Step 3: Cross multiply
    68,354.42x = 102,542.56 × 28,911.87
  4. Step 4: Simplify right side
    68,354.42x = 2,964,697,091.91
  5. Step 5: Solve for x
    x = 2,964,697,091.91/68,354.42
  6. Step 6: Final answer
    x = 43,372.43

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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.