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Finding the Fourth Proportional to 216,965.40, 325,418.10 and 67,308.60

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Solution

The fourth proportional to 216,965.40, 325,418.10 and 67,308.60 is: 100,953.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,965.40 : 325,418.10 = 67,308.60 : x
  2. Step 2: Convert to fraction form
    216,965.40/325,418.10 = 67,308.60/x
  3. Step 3: Cross multiply
    216,965.40x = 325,418.10 × 67,308.60
  4. Step 4: Simplify right side
    216,965.40x = 21,903,436,725.66
  5. Step 5: Solve for x
    x = 21,903,436,725.66/216,965.40
  6. Step 6: Final answer
    x = 100,953.59

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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.