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Finding the Fourth Proportional to 212,241, 317,576.22 and 128,049.96

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Solution

The fourth proportional to 212,241, 317,576.22 and 128,049.96 is: 191,601.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,241 : 317,576.22 = 128,049.96 : x
  2. Step 2: Convert to fraction form
    212,241/317,576.22 = 128,049.96/x
  3. Step 3: Cross multiply
    212,241x = 317,576.22 × 128,049.96
  4. Step 4: Simplify right side
    212,241x = 40,665,622,267.95
  5. Step 5: Solve for x
    x = 40,665,622,267.95/212,241
  6. Step 6: Final answer
    x = 191,601.16

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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.