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Finding the Fourth Proportional to 216,622.67, 324,903.87 and 66,867.84

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Solution

The fourth proportional to 216,622.67, 324,903.87 and 66,867.84 is: 100,292.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,622.67 : 324,903.87 = 66,867.84 : x
  2. Step 2: Convert to fraction form
    216,622.67/324,903.87 = 66,867.84/x
  3. Step 3: Cross multiply
    216,622.67x = 324,903.87 × 66,867.84
  4. Step 4: Simplify right side
    216,622.67x = 21,725,619,994.54
  5. Step 5: Solve for x
    x = 21,725,619,994.54/216,622.67
  6. Step 6: Final answer
    x = 100,292.46

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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.