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Finding the Fourth Proportional to 215,980.71, 324,033.24 and 66,242.96

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Solution

The fourth proportional to 215,980.71, 324,033.24 and 66,242.96 is: 99,383.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,980.71 : 324,033.24 = 66,242.96 : x
  2. Step 2: Convert to fraction form
    215,980.71/324,033.24 = 66,242.96/x
  3. Step 3: Cross multiply
    215,980.71x = 324,033.24 × 66,242.96
  4. Step 4: Simplify right side
    215,980.71x = 21,464,920,955.99
  5. Step 5: Solve for x
    x = 21,464,920,955.99/215,980.71
  6. Step 6: Final answer
    x = 99,383.51

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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.