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Finding the Fourth Proportional to 171,359.50, 257,186.90 and 82,687.58

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Solution

The fourth proportional to 171,359.50, 257,186.90 and 82,687.58 is: 124,102.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,359.50 : 257,186.90 = 82,687.58 : x
  2. Step 2: Convert to fraction form
    171,359.50/257,186.90 = 82,687.58/x
  3. Step 3: Cross multiply
    171,359.50x = 257,186.90 × 82,687.58
  4. Step 4: Simplify right side
    171,359.50x = 21,266,163,235.50
  5. Step 5: Solve for x
    x = 21,266,163,235.50/171,359.50
  6. Step 6: Final answer
    x = 124,102.62

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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.