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Finding the Fourth Proportional to 172,909.44, 259,391.82 and 73,070.60

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Solution

The fourth proportional to 172,909.44, 259,391.82 and 73,070.60 is: 109,617.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,909.44 : 259,391.82 = 73,070.60 : x
  2. Step 2: Convert to fraction form
    172,909.44/259,391.82 = 73,070.60/x
  3. Step 3: Cross multiply
    172,909.44x = 259,391.82 × 73,070.60
  4. Step 4: Simplify right side
    172,909.44x = 18,953,915,922.49
  5. Step 5: Solve for x
    x = 18,953,915,922.49/172,909.44
  6. Step 6: Final answer
    x = 109,617.59

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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.