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Finding the Fourth Proportional to 172,218.96, 258,347.88 and 72,360.54

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Solution

The fourth proportional to 172,218.96, 258,347.88 and 72,360.54 is: 108,548.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,218.96 : 258,347.88 = 72,360.54 : x
  2. Step 2: Convert to fraction form
    172,218.96/258,347.88 = 72,360.54/x
  3. Step 3: Cross multiply
    172,218.96x = 258,347.88 × 72,360.54
  4. Step 4: Simplify right side
    172,218.96x = 18,694,192,104.66
  5. Step 5: Solve for x
    x = 18,694,192,104.66/172,218.96
  6. Step 6: Final answer
    x = 108,548.98

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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.