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Finding the Fourth Proportional to 171,498.21, 257,247.42 and 71,603.97

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Solution

The fourth proportional to 171,498.21, 257,247.42 and 71,603.97 is: 107,406.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,498.21 : 257,247.42 = 71,603.97 : x
  2. Step 2: Convert to fraction form
    171,498.21/257,247.42 = 71,603.97/x
  3. Step 3: Cross multiply
    171,498.21x = 257,247.42 × 71,603.97
  4. Step 4: Simplify right side
    171,498.21x = 18,419,936,544.26
  5. Step 5: Solve for x
    x = 18,419,936,544.26/171,498.21
  6. Step 6: Final answer
    x = 107,406.00

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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.