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Finding the Fourth Proportional to 215,680.59, 323,520.90 and 65,921.31

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Solution

The fourth proportional to 215,680.59, 323,520.90 and 65,921.31 is: 98,881.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,680.59 : 323,520.90 = 65,921.31 : x
  2. Step 2: Convert to fraction form
    215,680.59/323,520.90 = 65,921.31/x
  3. Step 3: Cross multiply
    215,680.59x = 323,520.90 × 65,921.31
  4. Step 4: Simplify right side
    215,680.59x = 21,326,921,540.38
  5. Step 5: Solve for x
    x = 21,326,921,540.38/215,680.59
  6. Step 6: Final answer
    x = 98,881.97

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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.