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Finding the Fourth Proportional to 129,730.88, 179,028.32 and 73,141.85

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Solution

The fourth proportional to 129,730.88, 179,028.32 and 73,141.85 is: 100,935.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,730.88 : 179,028.32 = 73,141.85 : x
  2. Step 2: Convert to fraction form
    129,730.88/179,028.32 = 73,141.85/x
  3. Step 3: Cross multiply
    129,730.88x = 179,028.32 × 73,141.85
  4. Step 4: Simplify right side
    129,730.88x = 13,094,462,609.05
  5. Step 5: Solve for x
    x = 13,094,462,609.05/129,730.88
  6. Step 6: Final answer
    x = 100,935.59

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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.