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Finding the Fourth Proportional to 172,644.78, 258,769.53 and 72,655.14

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Solution

The fourth proportional to 172,644.78, 258,769.53 and 72,655.14 is: 108,899.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,644.78 : 258,769.53 = 72,655.14 : x
  2. Step 2: Convert to fraction form
    172,644.78/258,769.53 = 72,655.14/x
  3. Step 3: Cross multiply
    172,644.78x = 258,769.53 × 72,655.14
  4. Step 4: Simplify right side
    172,644.78x = 18,800,936,429.88
  5. Step 5: Solve for x
    x = 18,800,936,429.88/172,644.78
  6. Step 6: Final answer
    x = 108,899.54

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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.