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Finding the Fourth Proportional to 171,608.10, 257,485.05 and 82,815.90

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Solution

The fourth proportional to 171,608.10, 257,485.05 and 82,815.90 is: 124,259.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,608.10 : 257,485.05 = 82,815.90 : x
  2. Step 2: Convert to fraction form
    171,608.10/257,485.05 = 82,815.90/x
  3. Step 3: Cross multiply
    171,608.10x = 257,485.05 × 82,815.90
  4. Step 4: Simplify right side
    171,608.10x = 21,323,856,152.30
  5. Step 5: Solve for x
    x = 21,323,856,152.30/171,608.10
  6. Step 6: Final answer
    x = 124,259.03

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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.