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Finding the Fourth Proportional to 172,105.49, 258,184.44 and 87,819.59

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Solution

The fourth proportional to 172,105.49, 258,184.44 and 87,819.59 is: 131,742.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,105.49 : 258,184.44 = 87,819.59 : x
  2. Step 2: Convert to fraction form
    172,105.49/258,184.44 = 87,819.59/x
  3. Step 3: Cross multiply
    172,105.49x = 258,184.44 × 87,819.59
  4. Step 4: Simplify right side
    172,105.49x = 22,673,651,665.18
  5. Step 5: Solve for x
    x = 22,673,651,665.18/172,105.49
  6. Step 6: Final answer
    x = 131,742.76

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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.