Home / 216,243.12-324,265.86-66,431.19

Finding the Fourth Proportional to 216,243.12, 324,265.86 and 66,431.19

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Solution

The fourth proportional to 216,243.12, 324,265.86 and 66,431.19 is: 99,616.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,243.12 : 324,265.86 = 66,431.19 : x
  2. Step 2: Convert to fraction form
    216,243.12/324,265.86 = 66,431.19/x
  3. Step 3: Cross multiply
    216,243.12x = 324,265.86 × 66,431.19
  4. Step 4: Simplify right side
    216,243.12x = 21,541,366,956.17
  5. Step 5: Solve for x
    x = 21,541,366,956.17/216,243.12
  6. Step 6: Final answer
    x = 99,616.43

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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.