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Finding the Fourth Proportional to 171,415.44, 257,175.81 and 76,725.43

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Solution

The fourth proportional to 171,415.44, 257,175.81 and 76,725.43 is: 115,111.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,415.44 : 257,175.81 = 76,725.43 : x
  2. Step 2: Convert to fraction form
    171,415.44/257,175.81 = 76,725.43/x
  3. Step 3: Cross multiply
    171,415.44x = 257,175.81 × 76,725.43
  4. Step 4: Simplify right side
    171,415.44x = 19,731,923,964.91
  5. Step 5: Solve for x
    x = 19,731,923,964.91/171,415.44
  6. Step 6: Final answer
    x = 115,111.71

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1.5x scale

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.