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Finding the Fourth Proportional to 172,698.58, 259,082.80 and 72,858.99

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Solution

The fourth proportional to 172,698.58, 259,082.80 and 72,858.99 is: 109,303.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,698.58 : 259,082.80 = 72,858.99 : x
  2. Step 2: Convert to fraction form
    172,698.58/259,082.80 = 72,858.99/x
  3. Step 3: Cross multiply
    172,698.58x = 259,082.80 × 72,858.99
  4. Step 4: Simplify right side
    172,698.58x = 18,876,511,134.37
  5. Step 5: Solve for x
    x = 18,876,511,134.37/172,698.58
  6. Step 6: Final answer
    x = 109,303.22

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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.