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Finding the Fourth Proportional to 216,906.60, 325,384.20 and 67,145.70

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Solution

The fourth proportional to 216,906.60, 325,384.20 and 67,145.70 is: 100,726.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,906.60 : 325,384.20 = 67,145.70 : x
  2. Step 2: Convert to fraction form
    216,906.60/325,384.20 = 67,145.70/x
  3. Step 3: Cross multiply
    216,906.60x = 325,384.20 × 67,145.70
  4. Step 4: Simplify right side
    216,906.60x = 21,848,149,877.94
  5. Step 5: Solve for x
    x = 21,848,149,877.94/216,906.60
  6. Step 6: Final answer
    x = 100,726.07

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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.