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Finding the Fourth Proportional to 216,118.30, 324,203.32 and 66,338.96

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Solution

The fourth proportional to 216,118.30, 324,203.32 and 66,338.96 is: 99,516.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,118.30 : 324,203.32 = 66,338.96 : x
  2. Step 2: Convert to fraction form
    216,118.30/324,203.32 = 66,338.96/x
  3. Step 3: Cross multiply
    216,118.30x = 324,203.32 × 66,338.96
  4. Step 4: Simplify right side
    216,118.30x = 21,507,311,077.35
  5. Step 5: Solve for x
    x = 21,507,311,077.35/216,118.30
  6. Step 6: Final answer
    x = 99,516.38

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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.