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Finding the Fourth Proportional to 216,635.25, 324,922.80 and 66,880.47

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Solution

The fourth proportional to 216,635.25, 324,922.80 and 66,880.47 is: 100,311.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,635.25 : 324,922.80 = 66,880.47 : x
  2. Step 2: Convert to fraction form
    216,635.25/324,922.80 = 66,880.47/x
  3. Step 3: Cross multiply
    216,635.25x = 324,922.80 × 66,880.47
  4. Step 4: Simplify right side
    216,635.25x = 21,730,989,577.72
  5. Step 5: Solve for x
    x = 21,730,989,577.72/216,635.25
  6. Step 6: Final answer
    x = 100,311.42

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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.