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Finding the Fourth Proportional to 216,608.28, 324,793.47 and 66,807

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Solution

The fourth proportional to 216,608.28, 324,793.47 and 66,807 is: 100,173.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,608.28 : 324,793.47 = 66,807 : x
  2. Step 2: Convert to fraction form
    216,608.28/324,793.47 = 66,807/x
  3. Step 3: Cross multiply
    216,608.28x = 324,793.47 × 66,807
  4. Step 4: Simplify right side
    216,608.28x = 21,698,477,350.29
  5. Step 5: Solve for x
    x = 21,698,477,350.29/216,608.28
  6. Step 6: Final answer
    x = 100,173.81

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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.