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Finding the Fourth Proportional to 171,637.35, 257,120.86 and 81,551.86

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Solution

The fourth proportional to 171,637.35, 257,120.86 and 81,551.86 is: 122,168.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,637.35 : 257,120.86 = 81,551.86 : x
  2. Step 2: Convert to fraction form
    171,637.35/257,120.86 = 81,551.86/x
  3. Step 3: Cross multiply
    171,637.35x = 257,120.86 × 81,551.86
  4. Step 4: Simplify right side
    171,637.35x = 20,968,684,377.80
  5. Step 5: Solve for x
    x = 20,968,684,377.80/171,637.35
  6. Step 6: Final answer
    x = 122,168.54

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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.