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Finding the Fourth Proportional to 171,087.40, 256,631.10 and 82,513.90

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Solution

The fourth proportional to 171,087.40, 256,631.10 and 82,513.90 is: 123,770.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,087.40 : 256,631.10 = 82,513.90 : x
  2. Step 2: Convert to fraction form
    171,087.40/256,631.10 = 82,513.90/x
  3. Step 3: Cross multiply
    171,087.40x = 256,631.10 × 82,513.90
  4. Step 4: Simplify right side
    171,087.40x = 21,175,632,922.29
  5. Step 5: Solve for x
    x = 21,175,632,922.29/171,087.40
  6. Step 6: Final answer
    x = 123,770.85

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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.