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Finding the Fourth Proportional to 172,915.83, 259,396.44 and 67,721.13

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Solution

The fourth proportional to 172,915.83, 259,396.44 and 67,721.13 is: 101,590.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,915.83 : 259,396.44 = 67,721.13 : x
  2. Step 2: Convert to fraction form
    172,915.83/259,396.44 = 67,721.13/x
  3. Step 3: Cross multiply
    172,915.83x = 259,396.44 × 67,721.13
  4. Step 4: Simplify right side
    172,915.83x = 17,566,620,034.78
  5. Step 5: Solve for x
    x = 17,566,620,034.78/172,915.83
  6. Step 6: Final answer
    x = 101,590.58

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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.