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Finding the Fourth Proportional to 172,745.89, 258,996.08 and 66,039.88

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Solution

The fourth proportional to 172,745.89, 258,996.08 and 66,039.88 is: 99,012.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,745.89 : 258,996.08 = 66,039.88 : x
  2. Step 2: Convert to fraction form
    172,745.89/258,996.08 = 66,039.88/x
  3. Step 3: Cross multiply
    172,745.89x = 258,996.08 × 66,039.88
  4. Step 4: Simplify right side
    172,745.89x = 17,104,070,775.32
  5. Step 5: Solve for x
    x = 17,104,070,775.32/172,745.89
  6. Step 6: Final answer
    x = 99,012.90

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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.