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Finding the Fourth Proportional to 172,231.40, 258,354.30 and 92,235.80

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Solution

The fourth proportional to 172,231.40, 258,354.30 and 92,235.80 is: 138,357.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,231.40 : 258,354.30 = 92,235.80 : x
  2. Step 2: Convert to fraction form
    172,231.40/258,354.30 = 92,235.80/x
  3. Step 3: Cross multiply
    172,231.40x = 258,354.30 × 92,235.80
  4. Step 4: Simplify right side
    172,231.40x = 23,829,515,543.94
  5. Step 5: Solve for x
    x = 23,829,515,543.94/172,231.40
  6. Step 6: Final answer
    x = 138,357.56

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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.