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Finding the Fourth Proportional to 172,112.10, 258,168.15 and 53,819.70

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Solution

The fourth proportional to 172,112.10, 258,168.15 and 53,819.70 is: 80,729.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,112.10 : 258,168.15 = 53,819.70 : x
  2. Step 2: Convert to fraction form
    172,112.10/258,168.15 = 53,819.70/x
  3. Step 3: Cross multiply
    172,112.10x = 258,168.15 × 53,819.70
  4. Step 4: Simplify right side
    172,112.10x = 13,894,532,382.56
  5. Step 5: Solve for x
    x = 13,894,532,382.56/172,112.10
  6. Step 6: Final answer
    x = 80,729.55

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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.