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Finding the Fourth Proportional to 172,212.12, 258,310.98 and 59,917.74

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Solution

The fourth proportional to 172,212.12, 258,310.98 and 59,917.74 is: 89,874.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,212.12 : 258,310.98 = 59,917.74 : x
  2. Step 2: Convert to fraction form
    172,212.12/258,310.98 = 59,917.74/x
  3. Step 3: Cross multiply
    172,212.12x = 258,310.98 × 59,917.74
  4. Step 4: Simplify right side
    172,212.12x = 15,477,410,138.79
  5. Step 5: Solve for x
    x = 15,477,410,138.79/172,212.12
  6. Step 6: Final answer
    x = 89,874.10

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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.