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Finding the Fourth Proportional to 171,394.40, 257,049.66 and 71,555.42

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Solution

The fourth proportional to 171,394.40, 257,049.66 and 71,555.42 is: 107,315.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,394.40 : 257,049.66 = 71,555.42 : x
  2. Step 2: Convert to fraction form
    171,394.40/257,049.66 = 71,555.42/x
  3. Step 3: Cross multiply
    171,394.40x = 257,049.66 × 71,555.42
  4. Step 4: Simplify right side
    171,394.40x = 18,393,296,382.16
  5. Step 5: Solve for x
    x = 18,393,296,382.16/171,394.40
  6. Step 6: Final answer
    x = 107,315.62

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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.