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Finding the Fourth Proportional to 172,819.80, 259,229.70 and 162,978.30

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Solution

The fourth proportional to 172,819.80, 259,229.70 and 162,978.30 is: 244,467.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,819.80 : 259,229.70 = 162,978.30 : x
  2. Step 2: Convert to fraction form
    172,819.80/259,229.70 = 162,978.30/x
  3. Step 3: Cross multiply
    172,819.80x = 259,229.70 × 162,978.30
  4. Step 4: Simplify right side
    172,819.80x = 42,248,815,815.51
  5. Step 5: Solve for x
    x = 42,248,815,815.51/172,819.80
  6. Step 6: Final answer
    x = 244,467.45

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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.