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Finding the Fourth Proportional to 218,603.40, 327,954.45 and 66,814.26

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Solution

The fourth proportional to 218,603.40, 327,954.45 and 66,814.26 is: 100,236.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,603.40 : 327,954.45 = 66,814.26 : x
  2. Step 2: Convert to fraction form
    218,603.40/327,954.45 = 66,814.26/x
  3. Step 3: Cross multiply
    218,603.40x = 327,954.45 × 66,814.26
  4. Step 4: Simplify right side
    218,603.40x = 21,912,033,890.46
  5. Step 5: Solve for x
    x = 21,912,033,890.46/218,603.40
  6. Step 6: Final answer
    x = 100,236.47

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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.