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Finding the Fourth Proportional to 72,983.81, 100,717.67 and 39,449.81

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Solution

The fourth proportional to 72,983.81, 100,717.67 and 39,449.81 is: 54,440.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,983.81 : 100,717.67 = 39,449.81 : x
  2. Step 2: Convert to fraction form
    72,983.81/100,717.67 = 39,449.81/x
  3. Step 3: Cross multiply
    72,983.81x = 100,717.67 × 39,449.81
  4. Step 4: Simplify right side
    72,983.81x = 3,973,293,295.56
  5. Step 5: Solve for x
    x = 3,973,293,295.56/72,983.81
  6. Step 6: Final answer
    x = 54,440.75

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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.