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Finding the Fourth Proportional to 271,500.50, 407,309.24 and 81,945

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Solution

The fourth proportional to 271,500.50, 407,309.24 and 81,945 is: 122,935.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    271,500.50 : 407,309.24 = 81,945 : x
  2. Step 2: Convert to fraction form
    271,500.50/407,309.24 = 81,945/x
  3. Step 3: Cross multiply
    271,500.50x = 407,309.24 × 81,945
  4. Step 4: Simplify right side
    271,500.50x = 33,376,955,671.80
  5. Step 5: Solve for x
    x = 33,376,955,671.80/271,500.50
  6. Step 6: Final answer
    x = 122,935.15

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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.