Home / 172,621.44-258,910.20-72,821.28

Finding the Fourth Proportional to 172,621.44, 258,910.20 and 72,821.28

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Solution

The fourth proportional to 172,621.44, 258,910.20 and 72,821.28 is: 109,222.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,621.44 : 258,910.20 = 72,821.28 : x
  2. Step 2: Convert to fraction form
    172,621.44/258,910.20 = 72,821.28/x
  3. Step 3: Cross multiply
    172,621.44x = 258,910.20 × 72,821.28
  4. Step 4: Simplify right side
    172,621.44x = 18,854,172,169.06
  5. Step 5: Solve for x
    x = 18,854,172,169.06/172,621.44
  6. Step 6: Final answer
    x = 109,222.66

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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.