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Finding the Fourth Proportional to 172,429.56, 258,707.52 and 72,614.88

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Solution

The fourth proportional to 172,429.56, 258,707.52 and 72,614.88 is: 108,948.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,429.56 : 258,707.52 = 72,614.88 : x
  2. Step 2: Convert to fraction form
    172,429.56/258,707.52 = 72,614.88/x
  3. Step 3: Cross multiply
    172,429.56x = 258,707.52 × 72,614.88
  4. Step 4: Simplify right side
    172,429.56x = 18,786,015,519.90
  5. Step 5: Solve for x
    x = 18,786,015,519.90/172,429.56
  6. Step 6: Final answer
    x = 108,948.93

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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.