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Finding the Fourth Proportional to 172,453.86, 258,369.48 and 72,435.06

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Solution

The fourth proportional to 172,453.86, 258,369.48 and 72,435.06 is: 108,521.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,453.86 : 258,369.48 = 72,435.06 : x
  2. Step 2: Convert to fraction form
    172,453.86/258,369.48 = 72,435.06/x
  3. Step 3: Cross multiply
    172,453.86x = 258,369.48 × 72,435.06
  4. Step 4: Simplify right side
    172,453.86x = 18,715,008,785.97
  5. Step 5: Solve for x
    x = 18,715,008,785.97/172,453.86
  6. Step 6: Final answer
    x = 108,521.83

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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.