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Finding the Fourth Proportional to 216,213.57, 324,320.36 and 64,412.96

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Solution

The fourth proportional to 216,213.57, 324,320.36 and 64,412.96 is: 96,619.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,213.57 : 324,320.36 = 64,412.96 : x
  2. Step 2: Convert to fraction form
    216,213.57/324,320.36 = 64,412.96/x
  3. Step 3: Cross multiply
    216,213.57x = 324,320.36 × 64,412.96
  4. Step 4: Simplify right side
    216,213.57x = 20,890,432,432.20
  5. Step 5: Solve for x
    x = 20,890,432,432.20/216,213.57
  6. Step 6: Final answer
    x = 96,619.43

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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.