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Finding the Fourth Proportional to 172,926.39, 259,299.83 and 66,278.86

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Solution

The fourth proportional to 172,926.39, 259,299.83 and 66,278.86 is: 99,383.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,926.39 : 259,299.83 = 66,278.86 : x
  2. Step 2: Convert to fraction form
    172,926.39/259,299.83 = 66,278.86/x
  3. Step 3: Cross multiply
    172,926.39x = 259,299.83 × 66,278.86
  4. Step 4: Simplify right side
    172,926.39x = 17,186,096,648.04
  5. Step 5: Solve for x
    x = 17,186,096,648.04/172,926.39
  6. Step 6: Final answer
    x = 99,383.88

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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.