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Finding the Fourth Proportional to 172,156.92, 258,185.16 and 66,950.88

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Solution

The fourth proportional to 172,156.92, 258,185.16 and 66,950.88 is: 100,406.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,156.92 : 258,185.16 = 66,950.88 : x
  2. Step 2: Convert to fraction form
    172,156.92/258,185.16 = 66,950.88/x
  3. Step 3: Cross multiply
    172,156.92x = 258,185.16 × 66,950.88
  4. Step 4: Simplify right side
    172,156.92x = 17,285,723,664.94
  5. Step 5: Solve for x
    x = 17,285,723,664.94/172,156.92
  6. Step 6: Final answer
    x = 100,406.79

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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.