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Finding the Fourth Proportional to 171,570.70, 257,457.15 and 71,723.20

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Solution

The fourth proportional to 171,570.70, 257,457.15 and 71,723.20 is: 107,627.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,570.70 : 257,457.15 = 71,723.20 : x
  2. Step 2: Convert to fraction form
    171,570.70/257,457.15 = 71,723.20/x
  3. Step 3: Cross multiply
    171,570.70x = 257,457.15 × 71,723.20
  4. Step 4: Simplify right side
    171,570.70x = 18,465,650,660.88
  5. Step 5: Solve for x
    x = 18,465,650,660.88/171,570.70
  6. Step 6: Final answer
    x = 107,627.06

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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.