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Finding the Fourth Proportional to 171,395.90, 257,051.90 and 71,556.92

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Solution

The fourth proportional to 171,395.90, 257,051.90 and 71,556.92 is: 107,317.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,395.90 : 257,051.90 = 71,556.92 : x
  2. Step 2: Convert to fraction form
    171,395.90/257,051.90 = 71,556.92/x
  3. Step 3: Cross multiply
    171,395.90x = 257,051.90 × 71,556.92
  4. Step 4: Simplify right side
    171,395.90x = 18,393,842,244.15
  5. Step 5: Solve for x
    x = 18,393,842,244.15/171,395.90
  6. Step 6: Final answer
    x = 107,317.87

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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.