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Finding the Fourth Proportional to 172,203.86, 258,060.48 and 126,868.69

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Solution

The fourth proportional to 172,203.86, 258,060.48 and 126,868.69 is: 190,122.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,203.86 : 258,060.48 = 126,868.69 : x
  2. Step 2: Convert to fraction form
    172,203.86/258,060.48 = 126,868.69/x
  3. Step 3: Cross multiply
    172,203.86x = 258,060.48 × 126,868.69
  4. Step 4: Simplify right side
    172,203.86x = 32,739,795,961.72
  5. Step 5: Solve for x
    x = 32,739,795,961.72/172,203.86
  6. Step 6: Final answer
    x = 190,122.31

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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.