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Finding the Fourth Proportional to 129,757.61, 179,065.20 and 73,168.58

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Solution

The fourth proportional to 129,757.61, 179,065.20 and 73,168.58 is: 100,972.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,757.61 : 179,065.20 = 73,168.58 : x
  2. Step 2: Convert to fraction form
    129,757.61/179,065.20 = 73,168.58/x
  3. Step 3: Cross multiply
    129,757.61x = 179,065.20 × 73,168.58
  4. Step 4: Simplify right side
    129,757.61x = 13,101,945,516.09
  5. Step 5: Solve for x
    x = 13,101,945,516.09/129,757.61
  6. Step 6: Final answer
    x = 100,972.47

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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.