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Finding the Fourth Proportional to 215,954.54, 323,994.03 and 66,216.89

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Solution

The fourth proportional to 215,954.54, 323,994.03 and 66,216.89 is: 99,344.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,954.54 : 323,994.03 = 66,216.89 : x
  2. Step 2: Convert to fraction form
    215,954.54/323,994.03 = 66,216.89/x
  3. Step 3: Cross multiply
    215,954.54x = 323,994.03 × 66,216.89
  4. Step 4: Simplify right side
    215,954.54x = 21,453,877,606.84
  5. Step 5: Solve for x
    x = 21,453,877,606.84/215,954.54
  6. Step 6: Final answer
    x = 99,344.42

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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.