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Finding the Fourth Proportional to 171,315.69, 257,026.12 and 76,625.55

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Solution

The fourth proportional to 171,315.69, 257,026.12 and 76,625.55 is: 114,961.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,315.69 : 257,026.12 = 76,625.55 : x
  2. Step 2: Convert to fraction form
    171,315.69/257,026.12 = 76,625.55/x
  3. Step 3: Cross multiply
    171,315.69x = 257,026.12 × 76,625.55
  4. Step 4: Simplify right side
    171,315.69x = 19,694,766,524.24
  5. Step 5: Solve for x
    x = 19,694,766,524.24/171,315.69
  6. Step 6: Final answer
    x = 114,961.84

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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.