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Finding the Fourth Proportional to 172,504.29, 258,668.91 and 78,929.85

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Solution

The fourth proportional to 172,504.29, 258,668.91 and 78,929.85 is: 118,354.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,504.29 : 258,668.91 = 78,929.85 : x
  2. Step 2: Convert to fraction form
    172,504.29/258,668.91 = 78,929.85/x
  3. Step 3: Cross multiply
    172,504.29x = 258,668.91 × 78,929.85
  4. Step 4: Simplify right side
    172,504.29x = 20,416,698,265.96
  5. Step 5: Solve for x
    x = 20,416,698,265.96/172,504.29
  6. Step 6: Final answer
    x = 118,354.73

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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.