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Finding the Fourth Proportional to 172,081.96, 258,121.92 and 66,900.92

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Solution

The fourth proportional to 172,081.96, 258,121.92 and 66,900.92 is: 100,350.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,081.96 : 258,121.92 = 66,900.92 : x
  2. Step 2: Convert to fraction form
    172,081.96/258,121.92 = 66,900.92/x
  3. Step 3: Cross multiply
    172,081.96x = 258,121.92 × 66,900.92
  4. Step 4: Simplify right side
    172,081.96x = 17,268,593,920.17
  5. Step 5: Solve for x
    x = 17,268,593,920.17/172,081.96
  6. Step 6: Final answer
    x = 100,350.98

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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.