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Finding the Fourth Proportional to 84,039.75, 115,974.86 and 50,505.75

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Solution

The fourth proportional to 84,039.75, 115,974.86 and 50,505.75 is: 69,697.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,039.75 : 115,974.86 = 50,505.75 : x
  2. Step 2: Convert to fraction form
    84,039.75/115,974.86 = 50,505.75/x
  3. Step 3: Cross multiply
    84,039.75x = 115,974.86 × 50,505.75
  4. Step 4: Simplify right side
    84,039.75x = 5,857,397,032.92
  5. Step 5: Solve for x
    x = 5,857,397,032.92/84,039.75
  6. Step 6: Final answer
    x = 69,697.94

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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.