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Finding the Fourth Proportional to 203,640.84, 305,338.54 and 91,300.72

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Solution

The fourth proportional to 203,640.84, 305,338.54 and 91,300.72 is: 136,896.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,640.84 : 305,338.54 = 91,300.72 : x
  2. Step 2: Convert to fraction form
    203,640.84/305,338.54 = 91,300.72/x
  3. Step 3: Cross multiply
    203,640.84x = 305,338.54 × 91,300.72
  4. Step 4: Simplify right side
    203,640.84x = 27,877,628,545.75
  5. Step 5: Solve for x
    x = 27,877,628,545.75/203,640.84
  6. Step 6: Final answer
    x = 136,896.06

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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.