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Finding the Fourth Proportional to 203,205.10, 304,980.45 and 91,057.90

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Solution

The fourth proportional to 203,205.10, 304,980.45 and 91,057.90 is: 136,664.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,205.10 : 304,980.45 = 91,057.90 : x
  2. Step 2: Convert to fraction form
    203,205.10/304,980.45 = 91,057.90/x
  3. Step 3: Cross multiply
    203,205.10x = 304,980.45 × 91,057.90
  4. Step 4: Simplify right side
    203,205.10x = 27,770,879,318.06
  5. Step 5: Solve for x
    x = 27,770,879,318.06/203,205.10
  6. Step 6: Final answer
    x = 136,664.28

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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.