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Finding the Fourth Proportional to 84,940.30, 127,446.90 and 43,387.30

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Solution

The fourth proportional to 84,940.30, 127,446.90 and 43,387.30 is: 65,099.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,940.30 : 127,446.90 = 43,387.30 : x
  2. Step 2: Convert to fraction form
    84,940.30/127,446.90 = 43,387.30/x
  3. Step 3: Cross multiply
    84,940.30x = 127,446.90 × 43,387.30
  4. Step 4: Simplify right side
    84,940.30x = 5,529,576,884.37
  5. Step 5: Solve for x
    x = 5,529,576,884.37/84,940.30
  6. Step 6: Final answer
    x = 65,099.57

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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.