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Finding the Fourth Proportional to 216,568.80, 324,635.13 and 90,278.97

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Solution

The fourth proportional to 216,568.80, 324,635.13 and 90,278.97 is: 135,327.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,568.80 : 324,635.13 = 90,278.97 : x
  2. Step 2: Convert to fraction form
    216,568.80/324,635.13 = 90,278.97/x
  3. Step 3: Cross multiply
    216,568.80x = 324,635.13 × 90,278.97
  4. Step 4: Simplify right side
    216,568.80x = 29,307,725,162.22
  5. Step 5: Solve for x
    x = 29,307,725,162.22/216,568.80
  6. Step 6: Final answer
    x = 135,327.55

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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.