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Finding the Fourth Proportional to 171,885.15, 257,563.98 and 71,990.67

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Solution

The fourth proportional to 171,885.15, 257,563.98 and 71,990.67 is: 107,875.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,885.15 : 257,563.98 = 71,990.67 : x
  2. Step 2: Convert to fraction form
    171,885.15/257,563.98 = 71,990.67/x
  3. Step 3: Cross multiply
    171,885.15x = 257,563.98 × 71,990.67
  4. Step 4: Simplify right side
    171,885.15x = 18,542,203,488.07
  5. Step 5: Solve for x
    x = 18,542,203,488.07/171,885.15
  6. Step 6: Final answer
    x = 107,875.54

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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.