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Finding the Fourth Proportional to 129,676.52, 178,950.39 and 72,326.09

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Solution

The fourth proportional to 129,676.52, 178,950.39 and 72,326.09 is: 99,808.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,676.52 : 178,950.39 = 72,326.09 : x
  2. Step 2: Convert to fraction form
    129,676.52/178,950.39 = 72,326.09/x
  3. Step 3: Cross multiply
    129,676.52x = 178,950.39 × 72,326.09
  4. Step 4: Simplify right side
    129,676.52x = 12,942,782,012.68
  5. Step 5: Solve for x
    x = 12,942,782,012.68/129,676.52
  6. Step 6: Final answer
    x = 99,808.22

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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.