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Finding the Fourth Proportional to 171,567.20, 257,451.90 and 71,719.70

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Solution

The fourth proportional to 171,567.20, 257,451.90 and 71,719.70 is: 107,621.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,567.20 : 257,451.90 = 71,719.70 : x
  2. Step 2: Convert to fraction form
    171,567.20/257,451.90 = 71,719.70/x
  3. Step 3: Cross multiply
    171,567.20x = 257,451.90 × 71,719.70
  4. Step 4: Simplify right side
    171,567.20x = 18,464,373,032.43
  5. Step 5: Solve for x
    x = 18,464,373,032.43/171,567.20
  6. Step 6: Final answer
    x = 107,621.81

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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.