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Finding the Fourth Proportional to 216,716.82, 324,994.39 and 74,521.87

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Solution

The fourth proportional to 216,716.82, 324,994.39 and 74,521.87 is: 111,755.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,716.82 : 324,994.39 = 74,521.87 : x
  2. Step 2: Convert to fraction form
    216,716.82/324,994.39 = 74,521.87/x
  3. Step 3: Cross multiply
    216,716.82x = 324,994.39 × 74,521.87
  4. Step 4: Simplify right side
    216,716.82x = 24,219,189,682.31
  5. Step 5: Solve for x
    x = 24,219,189,682.31/216,716.82
  6. Step 6: Final answer
    x = 111,755.01

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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.