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Finding the Fourth Proportional to 71,768.97, 99,031.41 and 39,933.54

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Solution

The fourth proportional to 71,768.97, 99,031.41 and 39,933.54 is: 55,102.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,768.97 : 99,031.41 = 39,933.54 : x
  2. Step 2: Convert to fraction form
    71,768.97/99,031.41 = 39,933.54/x
  3. Step 3: Cross multiply
    71,768.97x = 99,031.41 × 39,933.54
  4. Step 4: Simplify right side
    71,768.97x = 3,954,674,772.49
  5. Step 5: Solve for x
    x = 3,954,674,772.49/71,768.97
  6. Step 6: Final answer
    x = 55,102.85

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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.