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Finding the Fourth Proportional to 272,529, 408,797.15 and 85,540.50

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Solution

The fourth proportional to 272,529, 408,797.15 and 85,540.50 is: 128,311.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,529 : 408,797.15 = 85,540.50 : x
  2. Step 2: Convert to fraction form
    272,529/408,797.15 = 85,540.50/x
  3. Step 3: Cross multiply
    272,529x = 408,797.15 × 85,540.50
  4. Step 4: Simplify right side
    272,529x = 34,968,712,181.87
  5. Step 5: Solve for x
    x = 34,968,712,181.87/272,529
  6. Step 6: Final answer
    x = 128,311.89

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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.