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Finding the Fourth Proportional to 171,704.40, 257,556.60 and 71,831.40

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Solution

The fourth proportional to 171,704.40, 257,556.60 and 71,831.40 is: 107,747.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,704.40 : 257,556.60 = 71,831.40 : x
  2. Step 2: Convert to fraction form
    171,704.40/257,556.60 = 71,831.40/x
  3. Step 3: Cross multiply
    171,704.40x = 257,556.60 × 71,831.40
  4. Step 4: Simplify right side
    171,704.40x = 18,500,651,157.24
  5. Step 5: Solve for x
    x = 18,500,651,157.24/171,704.40
  6. Step 6: Final answer
    x = 107,747.10

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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.