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Finding the Fourth Proportional to 216,372.22, 324,568.35 and 66,619.22

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Solution

The fourth proportional to 216,372.22, 324,568.35 and 66,619.22 is: 99,931.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,372.22 : 324,568.35 = 66,619.22 : x
  2. Step 2: Convert to fraction form
    216,372.22/324,568.35 = 66,619.22/x
  3. Step 3: Cross multiply
    216,372.22x = 324,568.35 × 66,619.22
  4. Step 4: Simplify right side
    216,372.22x = 21,622,490,313.69
  5. Step 5: Solve for x
    x = 21,622,490,313.69/216,372.22
  6. Step 6: Final answer
    x = 99,931.92

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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.