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Finding the Fourth Proportional to 171,539.44, 257,171.70 and 81,536.98

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Solution

The fourth proportional to 171,539.44, 257,171.70 and 81,536.98 is: 122,240.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,539.44 : 257,171.70 = 81,536.98 : x
  2. Step 2: Convert to fraction form
    171,539.44/257,171.70 = 81,536.98/x
  3. Step 3: Cross multiply
    171,539.44x = 257,171.70 × 81,536.98
  4. Step 4: Simplify right side
    171,539.44x = 20,969,003,759.47
  5. Step 5: Solve for x
    x = 20,969,003,759.47/171,539.44
  6. Step 6: Final answer
    x = 122,240.13

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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.