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Finding the Fourth Proportional to 171,917.60, 257,876.40 and 115,930.40

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Solution

The fourth proportional to 171,917.60, 257,876.40 and 115,930.40 is: 173,895.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,917.60 : 257,876.40 = 115,930.40 : x
  2. Step 2: Convert to fraction form
    171,917.60/257,876.40 = 115,930.40/x
  3. Step 3: Cross multiply
    171,917.60x = 257,876.40 × 115,930.40
  4. Step 4: Simplify right side
    171,917.60x = 29,895,714,202.56
  5. Step 5: Solve for x
    x = 29,895,714,202.56/171,917.60
  6. Step 6: Final answer
    x = 173,895.60

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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.