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Finding the Fourth Proportional to 173,871.20, 260,806.80 and 85,181.60

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Solution

The fourth proportional to 173,871.20, 260,806.80 and 85,181.60 is: 127,772.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,871.20 : 260,806.80 = 85,181.60 : x
  2. Step 2: Convert to fraction form
    173,871.20/260,806.80 = 85,181.60/x
  3. Step 3: Cross multiply
    173,871.20x = 260,806.80 × 85,181.60
  4. Step 4: Simplify right side
    173,871.20x = 22,215,940,514.88
  5. Step 5: Solve for x
    x = 22,215,940,514.88/173,871.20
  6. Step 6: Final answer
    x = 127,772.40

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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.