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Finding the Fourth Proportional to 171,806.60, 257,709.90 and 87,825.80

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Solution

The fourth proportional to 171,806.60, 257,709.90 and 87,825.80 is: 131,738.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,806.60 : 257,709.90 = 87,825.80 : x
  2. Step 2: Convert to fraction form
    171,806.60/257,709.90 = 87,825.80/x
  3. Step 3: Cross multiply
    171,806.60x = 257,709.90 × 87,825.80
  4. Step 4: Simplify right side
    171,806.60x = 22,633,578,135.42
  5. Step 5: Solve for x
    x = 22,633,578,135.42/171,806.60
  6. Step 6: Final answer
    x = 131,738.70

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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.