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Finding the Fourth Proportional to 172,590.54, 258,915.33 and 79,104.30

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Solution

The fourth proportional to 172,590.54, 258,915.33 and 79,104.30 is: 118,669.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,590.54 : 258,915.33 = 79,104.30 : x
  2. Step 2: Convert to fraction form
    172,590.54/258,915.33 = 79,104.30/x
  3. Step 3: Cross multiply
    172,590.54x = 258,915.33 × 79,104.30
  4. Step 4: Simplify right side
    172,590.54x = 20,481,315,938.92
  5. Step 5: Solve for x
    x = 20,481,315,938.92/172,590.54
  6. Step 6: Final answer
    x = 118,669.98

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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.