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Finding the Fourth Proportional to 218,426.49, 327,653.81 and 68,672.58

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Solution

The fourth proportional to 218,426.49, 327,653.81 and 68,672.58 is: 103,013.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,426.49 : 327,653.81 = 68,672.58 : x
  2. Step 2: Convert to fraction form
    218,426.49/327,653.81 = 68,672.58/x
  3. Step 3: Cross multiply
    218,426.49x = 327,653.81 × 68,672.58
  4. Step 4: Simplify right side
    218,426.49x = 22,500,831,164.99
  5. Step 5: Solve for x
    x = 22,500,831,164.99/218,426.49
  6. Step 6: Final answer
    x = 103,013.29

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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.