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Finding the Fourth Proportional to 215,676.59, 323,514.89 and 65,917.31

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Solution

The fourth proportional to 215,676.59, 323,514.89 and 65,917.31 is: 98,875.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,676.59 : 323,514.89 = 65,917.31 : x
  2. Step 2: Convert to fraction form
    215,676.59/323,514.89 = 65,917.31/x
  3. Step 3: Cross multiply
    215,676.59x = 323,514.89 × 65,917.31
  4. Step 4: Simplify right side
    215,676.59x = 21,325,231,293.75
  5. Step 5: Solve for x
    x = 21,325,231,293.75/215,676.59
  6. Step 6: Final answer
    x = 98,875.97

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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.