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Finding the Fourth Proportional to 68,434.80, 102,709.80 and 33,404.40

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Solution

The fourth proportional to 68,434.80, 102,709.80 and 33,404.40 is: 50,134.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,434.80 : 102,709.80 = 33,404.40 : x
  2. Step 2: Convert to fraction form
    68,434.80/102,709.80 = 33,404.40/x
  3. Step 3: Cross multiply
    68,434.80x = 102,709.80 × 33,404.40
  4. Step 4: Simplify right side
    68,434.80x = 3,430,959,243.12
  5. Step 5: Solve for x
    x = 3,430,959,243.12/68,434.80
  6. Step 6: Final answer
    x = 50,134.72

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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.