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Finding the Fourth Proportional to 84,128.68, 115,961.57 and 73,198.90

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Solution

The fourth proportional to 84,128.68, 115,961.57 and 73,198.90 is: 100,896.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,128.68 : 115,961.57 = 73,198.90 : x
  2. Step 2: Convert to fraction form
    84,128.68/115,961.57 = 73,198.90/x
  3. Step 3: Cross multiply
    84,128.68x = 115,961.57 × 73,198.90
  4. Step 4: Simplify right side
    84,128.68x = 8,488,259,366.27
  5. Step 5: Solve for x
    x = 8,488,259,366.27/84,128.68
  6. Step 6: Final answer
    x = 100,896.14

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1.5x scale

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.