Home / 172,721.86-258,971.50-72,855.34

Finding the Fourth Proportional to 172,721.86, 258,971.50 and 72,855.34

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Solution

The fourth proportional to 172,721.86, 258,971.50 and 72,855.34 is: 109,236.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,721.86 : 258,971.50 = 72,855.34 : x
  2. Step 2: Convert to fraction form
    172,721.86/258,971.50 = 72,855.34/x
  3. Step 3: Cross multiply
    172,721.86x = 258,971.50 × 72,855.34
  4. Step 4: Simplify right side
    172,721.86x = 18,867,456,682.81
  5. Step 5: Solve for x
    x = 18,867,456,682.81/172,721.86
  6. Step 6: Final answer
    x = 109,236.07

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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.