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Finding the Fourth Proportional to 217,597.56, 326,171.80 and 91,311.16

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Solution

The fourth proportional to 217,597.56, 326,171.80 and 91,311.16 is: 136,872.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,597.56 : 326,171.80 = 91,311.16 : x
  2. Step 2: Convert to fraction form
    217,597.56/326,171.80 = 91,311.16/x
  3. Step 3: Cross multiply
    217,597.56x = 326,171.80 × 91,311.16
  4. Step 4: Simplify right side
    217,597.56x = 29,783,125,417.29
  5. Step 5: Solve for x
    x = 29,783,125,417.29/217,597.56
  6. Step 6: Final answer
    x = 136,872.52

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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.