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Finding the Fourth Proportional to 71,805.63, 99,093.48 and 39,976.68

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Solution

The fourth proportional to 71,805.63, 99,093.48 and 39,976.68 is: 55,168.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,805.63 : 99,093.48 = 39,976.68 : x
  2. Step 2: Convert to fraction form
    71,805.63/99,093.48 = 39,976.68/x
  3. Step 3: Cross multiply
    71,805.63x = 99,093.48 × 39,976.68
  4. Step 4: Simplify right side
    71,805.63x = 3,961,428,340.05
  5. Step 5: Solve for x
    x = 3,961,428,340.05/71,805.63
  6. Step 6: Final answer
    x = 55,168.77

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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.