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Finding the Fourth Proportional to 172,508.04, 258,791.58 and 79,021.80

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Solution

The fourth proportional to 172,508.04, 258,791.58 and 79,021.80 is: 118,546.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,508.04 : 258,791.58 = 79,021.80 : x
  2. Step 2: Convert to fraction form
    172,508.04/258,791.58 = 79,021.80/x
  3. Step 3: Cross multiply
    172,508.04x = 258,791.58 × 79,021.80
  4. Step 4: Simplify right side
    172,508.04x = 20,450,176,476.44
  5. Step 5: Solve for x
    x = 20,450,176,476.44/172,508.04
  6. Step 6: Final answer
    x = 118,546.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.