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Finding the Fourth Proportional to 129,757.89, 179,065.92 and 73,169.28

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Solution

The fourth proportional to 129,757.89, 179,065.92 and 73,169.28 is: 100,973.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,757.89 : 179,065.92 = 73,169.28 : x
  2. Step 2: Convert to fraction form
    129,757.89/179,065.92 = 73,169.28/x
  3. Step 3: Cross multiply
    129,757.89x = 179,065.92 × 73,169.28
  4. Step 4: Simplify right side
    129,757.89x = 13,102,124,438.94
  5. Step 5: Solve for x
    x = 13,102,124,438.94/129,757.89
  6. Step 6: Final answer
    x = 100,973.62

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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.