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Finding the Fourth Proportional to 172,519.30, 258,625.05 and 67,313.80

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Solution

The fourth proportional to 172,519.30, 258,625.05 and 67,313.80 is: 100,910.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,519.30 : 258,625.05 = 67,313.80 : x
  2. Step 2: Convert to fraction form
    172,519.30/258,625.05 = 67,313.80/x
  3. Step 3: Cross multiply
    172,519.30x = 258,625.05 × 67,313.80
  4. Step 4: Simplify right side
    172,519.30x = 17,409,034,890.69
  5. Step 5: Solve for x
    x = 17,409,034,890.69/172,519.30
  6. Step 6: Final answer
    x = 100,910.65

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1.5x scale

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.