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Finding the Fourth Proportional to 171,638.35, 257,122.36 and 81,552.86

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Solution

The fourth proportional to 171,638.35, 257,122.36 and 81,552.86 is: 122,170.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,638.35 : 257,122.36 = 81,552.86 : x
  2. Step 2: Convert to fraction form
    171,638.35/257,122.36 = 81,552.86/x
  3. Step 3: Cross multiply
    171,638.35x = 257,122.36 × 81,552.86
  4. Step 4: Simplify right side
    171,638.35x = 20,969,063,827.95
  5. Step 5: Solve for x
    x = 20,969,063,827.95/171,638.35
  6. Step 6: Final answer
    x = 122,170.04

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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.