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Finding the Fourth Proportional to 136,219.49, 203,935.57 and 86,355.89

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Solution

The fourth proportional to 136,219.49, 203,935.57 and 86,355.89 is: 129,284.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,219.49 : 203,935.57 = 86,355.89 : x
  2. Step 2: Convert to fraction form
    136,219.49/203,935.57 = 86,355.89/x
  3. Step 3: Cross multiply
    136,219.49x = 203,935.57 × 86,355.89
  4. Step 4: Simplify right side
    136,219.49x = 17,611,036,414.44
  5. Step 5: Solve for x
    x = 17,611,036,414.44/136,219.49
  6. Step 6: Final answer
    x = 129,284.27

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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.