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Finding the Fourth Proportional to 217,520.67, 326,267.90 and 129,335.37

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Solution

The fourth proportional to 217,520.67, 326,267.90 and 129,335.37 is: 193,995.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,520.67 : 326,267.90 = 129,335.37 : x
  2. Step 2: Convert to fraction form
    217,520.67/326,267.90 = 129,335.37/x
  3. Step 3: Cross multiply
    217,520.67x = 326,267.90 × 129,335.37
  4. Step 4: Simplify right side
    217,520.67x = 42,197,978,918.95
  5. Step 5: Solve for x
    x = 42,197,978,918.95/217,520.67
  6. Step 6: Final answer
    x = 193,995.26

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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.