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Finding the Fourth Proportional to 172,049.40, 258,035.40 and 72,322.20

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Solution

The fourth proportional to 172,049.40, 258,035.40 and 72,322.20 is: 108,467.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,049.40 : 258,035.40 = 72,322.20 : x
  2. Step 2: Convert to fraction form
    172,049.40/258,035.40 = 72,322.20/x
  3. Step 3: Cross multiply
    172,049.40x = 258,035.40 × 72,322.20
  4. Step 4: Simplify right side
    172,049.40x = 18,661,687,805.88
  5. Step 5: Solve for x
    x = 18,661,687,805.88/172,049.40
  6. Step 6: Final answer
    x = 108,467.03

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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.