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Finding the Fourth Proportional to 172,575.96, 258,956.96 and 72,805.32

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Solution

The fourth proportional to 172,575.96, 258,956.96 and 72,805.32 is: 109,247.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,575.96 : 258,956.96 = 72,805.32 : x
  2. Step 2: Convert to fraction form
    172,575.96/258,956.96 = 72,805.32/x
  3. Step 3: Cross multiply
    172,575.96x = 258,956.96 × 72,805.32
  4. Step 4: Simplify right side
    172,575.96x = 18,853,444,339.03
  5. Step 5: Solve for x
    x = 18,853,444,339.03/172,575.96
  6. Step 6: Final answer
    x = 109,247.22

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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.