Home / 172,890.06-258,890.49-138,996.78

Finding the Fourth Proportional to 172,890.06, 258,890.49 and 138,996.78

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Solution

The fourth proportional to 172,890.06, 258,890.49 and 138,996.78 is: 208,137.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,890.06 : 258,890.49 = 138,996.78 : x
  2. Step 2: Convert to fraction form
    172,890.06/258,890.49 = 138,996.78/x
  3. Step 3: Cross multiply
    172,890.06x = 258,890.49 × 138,996.78
  4. Step 4: Simplify right side
    172,890.06x = 35,984,944,482.62
  5. Step 5: Solve for x
    x = 35,984,944,482.62/172,890.06
  6. Step 6: Final answer
    x = 208,137.73

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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.