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Finding the Fourth Proportional to 84,921.99, 117,189.50 and 47,195.43

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Solution

The fourth proportional to 84,921.99, 117,189.50 and 47,195.43 is: 65,128.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,921.99 : 117,189.50 = 47,195.43 : x
  2. Step 2: Convert to fraction form
    84,921.99/117,189.50 = 47,195.43/x
  3. Step 3: Cross multiply
    84,921.99x = 117,189.50 × 47,195.43
  4. Step 4: Simplify right side
    84,921.99x = 5,530,808,608.01
  5. Step 5: Solve for x
    x = 5,530,808,608.01/84,921.99
  6. Step 6: Final answer
    x = 65,128.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.